How many fish in a 36 gallon aquarium

A 30-gallon fish tank strikes the perfect balance between being too large and too small. With this size, you can accommodate many types of fish, from tiny tropicals to enormous cichlids. ... 30 gallon breeder tank: 36 3/16 x18 1/4 x12 15/16; Aside from the standard rectangle, you can find bow front, hexagonal, and even fish bowl-shaped ...

So, a 30-gallon tank could hold up to six at a time. 7. Cherry Barbs. Cherry barbs are very small fish that can grow up to 2 inches in length, although they often top out at as small as 1.5 inches in length. Therefore, you should provide each cherry barb with at least 2 gallons of tank space.How many Angelfish in a 30 and 36 gallon tank. As with 25 or 29 gallons, it is possible to install up to 2 angelfish. It is possible to go up to 3, however, you will have to remove one of them once they reach their adult size. 10 gallons is enough for a young Angelfish, but at their adult sizes, they need 15 gallons of living space each.Generally speaking, for a 40 gallon tank with a plain or rectangular shape and an average sized fish population (2-3 inches per adult fish), 1 - 2 pounds of gravel per gallon is recommended. This means that for your 40 gallon tank, approximately 40 - 80 lbs. of gravel should do just fine.The 40-gallon breeder tank is designed with precision, measuring approximately 36 inches in length, 18 inches in width, and 16 inches in height. These dimensions offer a spacious canvas for creating aquatic landscapes that are both aesthetically pleasing and biologically functional. The extra width compared to conventional tanks allows for more ...Dec 28, 2013. #6. The recommended formula is 5 watts per gallon of water. What temperature are you trying to maintain, I'd run for higher temps, above 80F id recommend (2) 150W heaters. For temp's below, id run (2) 100W heaters that way you have a back up in case one goes out.

30 Gallon Aquarium Dimension. A standard 30 gallon fish tank will measure 36″x13″x16″. However the exact dimensions will depend on the shape and brand you pick. Breeder tanks usually have a different width and height to help create a squarer base which is needed for breeding. These 30 gallon breeder tanks usually measure 36″x18″x12″.Other common dimensions include 36'' L x 18'' W x 20'' H, and 55'' L x 22 W x 14.5'' H. ... How Many Fish for a 55 Gallon Tank? ... As for the total weight, a filled 55-gallon aquarium can be anywhere between 479-550 lbs, depending on the material and water salinity level.Here is a list of the smallest tangs as fully-grown adult fish: Bristletooth Tomini Tang, with 6-inches as a fully-grown adult, is the smallest tang fish. SquareTail Bristletooth Tang: 6.5 inches. Yellow Eye Kole: Fully grown adult size: 7-inches. Two-spot bristle tooth: 8 inches. Unfortunately, your 36 gallon is fully stocked with just two adult goldies. Unless you are planning on upgrading to 50 gallons or more in the future, I wouldn't add any more fish. The reason for this, is because of the immense waste production of goldfish, and the size they can reach. Goldfish produce a TON of ammonia, and they need to be in a ... How Size Affects Aquarium Weight. A 180-gallon fish tank weighs over 1 ton. By. Shirlie Sharpe. ... 65-gallon: 36" x 18" x 24" 126 lbs. 772 lbs. 75 gallon: 48" x 18" x 21" 140 lbs. 850 lbs. 90-gallon: ... A 50-gallon fish tank will have the same weight measurements whether it is rectangular, hexagonal, or cylindrical in shape. ...When it comes to setting up a 75-gallon aquarium, understanding its dimensions is crucial. The length, width, and height of the tank play a significant role in determining the overall capacity, aesthetic appeal, and suitability for different fish species. Length. The length of a 75-gallon aquarium is an important factor to consider.

The 40-gallon breeder aquarium is a very popular size because of its 36” length x 18” width x 16” height (91 x 46 x 41 cm) dimensions. Other 40-gallon tanks have a more rectangular base, but the 40-gallon breeder tank has a deeper base without being too tall so that you can easily reach inside to clean the aquarium and catch fish that you have bred.All about the 40-gallon fish tank. A 40-gallon tank is a perfect aquarium for both freshwater and marine aquarium fish. We got a perfect space for decorating with more aquatic plants and lights that'll give a unique look to the tank. A perfect 40-gallon tank weighs 60lbs and has dimensions of 36″x13″x20″. It is also called a breeder ...Mar 14, 2023 · For example, extremely active, large fish such as Roseline Sharks need a tank that allows them adequate space to shoal and moves around freely. Ideally, you want to keep fish that grow no bigger than six inches in a 20-gallon tank, applying the one inch per gallon rule for multiple specimens. If you intend to keep more than 1, the general ‘rule-of-thumb’ is 5 gallons of water for each pea puffer followed by 3 gallons of water for every additional puffer fish. Therefore, a 29-gallon tank should contain no more than 9 or 10 pea puffers at anytime. Now that you know how many pea puffers can be kept in a 29-gallon aquarium, let’s ...But if you have plants, you want to use 1 to 1.5 pounds of gravel per gallon. So, 60-70 pounds of gravel is what you would need for a 55-gallon tank. Gravel is going to help your fish by maintaining water quality. There are a wide variety of types/styles of the grave for your aquarium.Also Read: How Many Molly Fish In A 30-Gallon Tank? 40-Gallon Aquarium. About 8 to 10 molly fish can thrive in a 40-gallon aquarium. Let’s take a look at the reasons: Spacious swimming area: A 40-gallon tank allows molly fish to swim freely, improving their overall well-being.

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If the heating requirement is between levels, move up to the next larger size. Example: Average room temperature: 68 degrees F. Target water temperature: 77 degrees F. Heating required: 9 degrees F (77 - 68 = 9) Tank size: 20 gallon. Heater size needed: 50 watts. Aquarium Heater Size Guide. Tank Size.Saltwater Aquarium BlogbiOrb Classic MCR 30L Aquariums. From £144.99. In Stock. View. Juwel Vision 180 LED Tropical Aquarium & Cabinet. From £664.00. In Stock. View. Find out how many litres of water your fish tank can hold with our water volume calculator, which can also work out how many fish can fit in your aquarium.Some Exceptions. While there are some keepers out there who say you can keep as many as 10 cichlids in a 36 gallon tank, there are some caveats to their care. First, the cichlids won't get any larger than 3 inches, even at maturity. And second, there is a super powerful filter while performing faithful water changes.

Plant the aquarium plants. Follow this guide for steps on how to set up a fish tank with live plants. Partially fill the fish tank with 4 to 6 inches of water to help support the plant leaves while inserting the roots into the substrate. Install the lid and light, and wait 30 minutes before turning on the equipment.Fish stock calculator using surface area, instead of fish per gallon, to estimate how many fish to stock in freshwater tropical, cold, or marine aquariumsAs a very broad general rule, a 20-gallon tank can probably support up to 20 fish, with up to 10 other species such as invertebrates, snails, and other bottom-feeders. ©Sandra Burm/Shutterstock.com. Basically, some species are just too large to thrive in a 20-gallon tank.For a new saltwater aquarium, the general rule of thumb is 1″ of fully matured fish for every 3-5 gallons of tank volume. The bigger the aquarium, the more fish you can have due to the higher quantities of nitrifying bacteria processing the bio-load. A 50G tank can house 10-16″ of fully-grown fish.The general rule is 1 inch of fish per gallon of water at full stocking levels. So that would be 36 very small 1" fish, or 15 or so 2" fish. Make sure you stock the aquarium slowly, over a number ...Nov 11, 2022 · A 36 gallon bow front aquarium is a perfect size for many different types of fish, and can be a beautiful addition to any room. Petsmart is a great place to find all the supplies you need for your new aquarium, including fish food, tanks, filters, and more. An Hawaiian Airlines flight from Phoenix to Honolulu hit severe turbulence about 30 minutes before landing on December 18th. Increased Offer! Hilton No Annual Fee 70K + Free Night ...Sep 1, 2022 · In total a 50 gallon aquarium can hold up to 25 small fish or between 2-5 medium sized fish. With a 100 gallon tank you can start keeping fish that grow beyond 10 inches in size. Oscars, Bala Sharks, Bichirs, and Discus are all good options. In total 100 gallons can hold between 18 and 40 fish. Which Size Aquarium Should You Get? In this comprehensive guide, we'll explore the top fish species that are well-suited for a 36-gallon bow front aquarium. Whether you're a beginner or an experienced hobbyist, we've got you covered with valuable insights, expert tips, and everything you need to know to create a thriving aquatic ecosystem.Many people mistakenly assume that you can keep the same number of fish in a 20-gallon standard tank as you can in a 20-gallon tall tank. However, the 20-gallon standard tank actually has a larger surface area due to its length and width dimensions. ... For many aquariums, a simple HOB (hang on back) filter will adequately aerate your …

Gallons = Length (inches) × Width (inches) × Height (inches) × 0.004329. Calculate the Gallons: Simply multiply the values according to the formula to get the total gallons your aquarium can hold. Interpret the Result: The calculated value represents the total capacity of your aquarium in gallons. This information is crucial for various ...

Surface area of a fish tank = length x width. To calculate how many fish you can have using this method is: 1 inch of adult fish for every 12 square inches of water surface area. For wide bodied fish, it is 1 inch of adult fish for every 20 square inches. The greater the surface area of your tank, the more fish you should be able to have.Buying a 75-gallon aquarium for your discus fish is highly recommended. This is a great tank size for these fish. You can keep six or seven discus fish in a tank of this size. Since many enthusiasts say that discus fish do best when kept in groups of six or more, it's sensible to go with a 75-gallon fish tank. If you have enough room for a ...A 29 gallon aquarium is a great size for many different types of fish. It is also a popular size for beginner aquarium enthusiasts. The dimensions of a 29 gallon aquarium are 48 inches long, 12 inches wide, and 20 inches tall. This size tank is perfect for housing small to medium sized fish such as goldfish, bettas, and guppies.Here are the 12 best freshwater fish for stocking your 10-gallon aquarium: 1. Asian Stone Catfish – Hara jerdoni. by Melyoramel. The Asian stone catfish, less commonly known as Hara jerdoni, is tiny at only 1.3 inches (3.3 cm) when fully grown. They originate from the waters of India and Bangladesh.Black Devil Snails (Faunus ater) 2 to 3 inches. Mystery Snails (Pomacea bridgesii) 2.5 to 3 inches. Rabbit Snails (Tylomelania sp.) 3 to 5 inches. Apple Snails (Ampullariidae) 5 inches. If you’re using the inch-per-gallon method, this will help determine how many snails go into a tank according to their species.A fish tank volume calculator is essential to find the right aquarium for the fish species you want to keep. Some fishes can do well in a 2 to 3-gallon tank, while others require a 20 or 30-gallon tank for flourishing. You can use a fish tank volume calculator to find the amount of water an aquarium can hold by inputting its dimensions.Our aquarium volume calculator outputs the weight of the water needed to fill the aquarium fully. To find the actual weight of the water in the aquarium you need to consider how full it will be and subtract a proportion of the water weight output from our tool. For example, if you plan to fill it to 90% of its capacity, you can use a percentage ...Top Fin ® Bow Front Aquarium Starter Kit - 36 Gallon. Discounted Price $118.39 Old Price $184.99 (121) ... 10–300-Gallon Fish Tanks Aquarium Starter Kits LED Aquariums Fish Bowls 360° View Aquariums Acrylic Fish Tanks Glass Aquariums Betta Tanks And More . You are bound to find the perfect setup for your fish at PetSmart.Fish stock calculator using surface area, instead of fish per gallon, to estimate how many fish to stock in freshwater tropical, cold, or marine aquariumsOne of the most common but hardest questions we get is “How many fish can you put in a 20-gallon aquarium?”. As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusses the three factors that will most impact.

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Therefore, a 10 gallon aquarium will need a 50 watt heater. As the tank size increases, the larger water volume is able to retain the heat better. If the tank size is 40 gallons or larger, the watts per gallon can be reduces to approximately 3.5. This chart will help you choose the right aquarium heater size:Most freshwater, tropical and marine aquarium fish eat shrimp, and many commercial foods contain dried shrimp and shrimp by-products. The labels on commercial food for home aquariu...You could try some harlequin rasboras, neon tetras, cardinal Tetras, or glow light tetras. Single fish might include dwarf gourami, cockatoo appisto, or Bolivian or German blue ram. reply share. #3. Bubblesthefish. 5 years ago. Schooling fish are great, and having 3 types in one tank is even better.This somehow conjured up emotions from decades ago when I had several marine aquariums with my father. It was our hobby together--great memories of feeding soft coral, eels and lion fish! I've been using the 10g tank to teach my 3 yr old daughter about fish and fish keeping. This past weekend we purchased a 36 gallon bow front aquarium that I ...For a new saltwater aquarium, the general rule of thumb is 1″ of fully matured fish for every 3-5 gallons of tank volume. The bigger the aquarium, the more fish you can have due to the higher quantities of nitrifying bacteria processing the bio-load. A 50G tank can house 10-16″ of fully-grown fish.Here, let me give you an example: 1 small clownfish - 2-3 inches. 1 Banggai cardinalfish - 2-3 inches. 1 firefish - 2-3 inches. 1 blue mandarin dragonet - 2-3 inches. 1 tailspot blenny - 1-2 inches. 1 Nassarius snail - 1 inch. 1 turbo snail - 1 inch. 7-9 dwarf hermit crabs of varying species 7-9 inches.One of the most common but hardest questions we get is "How many fish can you put in a 29-gallon aquarium? What about a 20-gallon tank? 55 gallons?". As you may guess, there is an infinite number of possible fish combinations for each tank size that we could recommend. To simplify things, read this article that discusse.Hello Everyone!In this video we take a closer look at fish that can go together in a 40 gallon breeder! Want more information on some of the fish featured in...You can’t wait to go to your local fish store and buy 100 fish for your 10 gallon fish tank. But wait, maybe you should rethink that plan. Not all fish can be kept together and there is a limit as to how many you can keep in your tank, no matter how big it might be. Here’s how to figure out how many fish per gallon your freshwater or ...The number of fish you can put in 50-liter aquarium is 16-17. The general estimation is 1 liter of water for 1 centimeter of fish. Suppose your fishes are 3 cm in size. Follow the steps to count the number of fish: Note down the volume of your aquarium in liters. Estimate the size of your fish in centimeters. Divide the volume by the size.3. Pygmy Corydoras. Dwarf Corydoras are one of the smallest Corydoras around and are very popular additions to the 10 gallon tank. Their maximum size of 1 inch (2.5cm), peaceful temperament, and schooling behaviors. They do require a lot of open space on a sandy bottom to sift and forage for foods. Origin. ….

Here, let me give you an example: 1 small clownfish - 2-3 inches. 1 Banggai cardinalfish - 2-3 inches. 1 firefish - 2-3 inches. 1 blue mandarin dragonet - 2-3 inches. 1 tailspot blenny - 1-2 inches. 1 Nassarius snail - 1 inch. 1 turbo snail - 1 inch. 7-9 dwarf hermit crabs of varying species 7-9 inches.Flex 32.5 As the largest model within this unique curved front aquarium series, Flex 32.5 features upgraded app-controlled LED lighting and an enhanced. Update Your Site & Language. United States | English; ... Mimic the natural cycle of the sun and moon to create a realistic environment for your fish. Program Gradual Settings: Sunrise, mid-day ...Jacques Cousteau’s grandson explains the pros and cons of one of the most globally adopted pastimes. The ethics of aquariums are a slippery matter. On the one hand, aquariums provi...Many people mistakenly assume that you can keep the same number of fish in a 20-gallon standard tank as you can in a 20-gallon tall tank. However, the 20-gallon standard tank actually has a larger surface area due to its length and width dimensions. ... Like aquarium fish, plants go through the process of cellular respiration, converting carbon ...This fish can grow to 8 inches in length and height. It's a pretty big discus fish and it requires 55 gallons of space per fish. Therefore, if we are talking about a 60-gallon tank, you can only fit 1 royal red discus fish into it. These guys require the water to be between 79 and 86 degrees, with a pH level between 6.1 and 7.5.A simple way to do that is to employ a clean-up crew in your tank. A clean-up crew consists of snails, crabs, shrimps, and starfish in your saltwater aquarium that perform the following tasks: · Clean-up detritus (non-living organic matter) · Sift through your sand. · Keeps algae under control on a day-to-day basis.A water test kit will help you determine whether your tank is in the proper ph range and nitrate, nitrite, and ammonia levels. A well-maintained 55-gallon fish tank should have a ph level of 7. 0-7. 2, and ammonia and nitrite levels should read 0ppm. Nitrates should be kept under 40 ppm.Location: Ensure you have an appropriate place to house your fish tank. The 90-gallon tank dimensions are typically 48″ x 18″ x 24″ (L x W x H), equivalent to 121.92 x 45.72 x 60.96 cm. Consider the tank weight too. Once filled, it’s a mammoth 1050 lbs. (476.27 kg)! How many fish in a 36 gallon aquarium, 1. How many fish you want to put into the tank; 2. The size of the tank, or how much water it can hold; 3. The shape of the tank, rectangle, round, etc.; and. 4. How many decorations you want to put in the tank. When talking about the size of the fish tank for your Angelfish, you need to consider more than the amount of water the tank can hold., In my 10 gallon, I have a mystery snail, 6 Pygmy Cory's and 5 neo shrimp with lots of plants, some mopani wood, spider wood, cholla wood and a lotus pod. I love how it looks and they have lots of hides and things to explore. I use a filter for 20 gallon., A 10-gallon tank is a minimum requirement for housing Zebra Danios. These fish grow up to 2 inches long, making their small size and peaceful nature ideal for community aquariums. Unlike many other species in this article, Zebra Danios can thrive in both cold and warm water., The aquarium filter flow rate is equal to the tank volume into the tank turnover rate. If you’ve got a 20-gallon tank, to get an aquarium filter turnover rate of 5, you will need a filter flow rate somewhere around the (100GPH) hundred gallons per hour range. In most cases, the filter pump flow rate determines the water flow rate for the filter., As a general rule, for small fish, you can calculate one inch of fish per gallon of water. For example, if you have a ten-gallon tank, you can keep ten one-inch fish. But for larger fish, it is recommended to allocate at least two gallons of water for every inch of fish. So, if you have a 50-gallon tank, you can keep five 10-inch fish., Lifespan: 2 to 3 years. Neon tetras give you plenty of bang for your buck if you want a brightly colored, lively display for your aquarium. Although they are easy to care for, Neon tetras are shoaling fish. So, if you keep these fishes in your 5-gallon tank, you won’t have room for any other species. 5., Six juvenile angelfish should be OK in a 36 gallon tank, but expect them to get much larger. In addition, angelfish start their puberty ordeal at approximately nine months of age. Siblings tend to be more tolerant of eachother, but mating rituals can be violent, and angelfish vigorously defend their spawning place and fry., You can’t wait to go to your local fish store and buy 100 fish for your 10 gallon fish tank. But wait, maybe you should rethink that plan. Not all fish can be kept together and there is a limit as to how many you can keep in your tank, no matter how big it might be. Here’s how to figure out how many fish per gallon your freshwater or ..., If you want to keep more than one slim-bodied goldfish in your tank, you should add an extra 12 gallons per additional fish. So, for two Common goldfish, you need a 42-gallon tank. That’s 30 gallons for the first goldfish, plus an extra 12 gallons for the second fish., Going by the numbers, however, you can put up to 8 to 10 fish in a 10-gallon aquarium tank. However, we would not recommend adding 10 fish in a tank unless the fish are tiny and do not generate too much waste. On the other hand, if you have chosen fish types that grow over time, you should limit the number to 8 or 6., 30 Gallon: 36 x 16 x 16: 48 lbs: 350 lbs: 40 Gallon (Long) 48 x 12 x 16: 60 lbs: 455 lbs: 50 Gallon: 36 x 18 x 19: 100 lbs: 600 lbs: 75 Gallon: 48 x 18 x 21: 140 lbs: 850 lbs: ... As I mentioned earlier, your aquarium size will affect how many fish you can fit in it. There are two basic formulas to work this out., The friendliest place on the web for anyone with an interest in aquariums or fish keeping! If you have answers, please help by responding to the unanswered posts. See posts with no answers. Aug 19, 2011 #1 I. iaml0st815 Aquarium Advice Newbie. Joined Mar 8, 2011 Messages 4. I've got a 36 gallon bow front aquarium that is going to be species ..., If you intend to keep more than 1, the general ‘rule-of-thumb’ is 5 gallons of water for each pea puffer followed by 3 gallons of water for every additional puffer fish. Therefore, a 29-gallon tank should contain no more than 9 or 10 pea puffers at anytime. Now that you know how many pea puffers can be kept in a 29-gallon aquarium, let’s ..., Lifespan: 2 to 3 years. Neon tetras give you plenty of bang for your buck if you want a brightly colored, lively display for your aquarium. Although they are easy to care for, Neon tetras are shoaling fish. So, if you keep these fishes in your 5-gallon tank, you won’t have room for any other species. 5., Fluval Edge 6 Gallon Version. Now, before we get started with the big guy, just in case you deemed it too big for your needs, there's always a 6-gallon version. Obviously, it won't hold as much as the 12 gallons, but it does the work the same and is built with the same care and thoughtfulness., Also Read: How Many Molly Fish In A 30-Gallon Tank? 40-Gallon Aquarium. About 8 to 10 molly fish can thrive in a 40-gallon aquarium. Let’s take a look at the reasons: Spacious swimming area: A 40-gallon tank allows molly fish to swim freely, improving their overall well-being., Tokyo's enchanting fish art exhibition uses over 5,000 goldfish. One of Tokyo’s most popular summer attractions features LED light displays, impressive glass sculptures, an immersi..., Saltwater Aquarium Blog, The 29-gallon fish tank is also a step up in height, which is great for growing a variety of aquarium plants. This aquarium size is also great as a hospital or quarantine tank for medium and larger fish. Dimensions: (L x W x H): 30 x 12 x 18 inches or 76 x 30 x 46 centimeters. Dry Weight: 40 pounds or 18 kilograms., A 75 gallon tank can comfortably house up to 30-45 tropical fish of various sizes, depending on the species. It is important to research the type of fish you plan to keep in your aquarium, as some species may require more or less space than others. Additionally, it is recommended that each fish have at least 2 gallons of water per inch of body ..., The Aqueon 90 Gallon Standard Glass Aquarium is as standard as it gets. This 48.5″ L x 18.5″ W x 25.375″ H tank features a black rim and can come with either black or clear silicone. Depending on material availability, the tank may sometimes be tempered glass. A stand and cover are not included., Many aquarium brands now offer the concentrated nitrifying bacteria in a bottle to speed up the cycling process. ... A member of my local fish club just finished cycling his 200 gallon with a fish-in cycle, it took a little over 4months. ... 36 am. Hi Aimee, That's awesome! Well done for having the patience to cycle your tank!, Option 1: Community Tank. A community tank is a great choice for those who want to mix different types of fish. Here are some compatible fish combos that work well in a 10-gallon tank: 6 Neon Tetras and 3 Corydoras Catfish. 5 Guppies and 2 Mystery Snails. 5 Cherry Barbs and 5 Rasboras., A 40-gallon fish tank is one of the best ones for beginners. It isn't too small and hence, you can easily keep a variety of fish in it. ... Best 40 Gallon Fish Tank: Aquariums & Breeder tanks (2024) by Jason Matthews / Updated: January 31, 2024. Our Top Picks: ... Best Acrylic Aquarium. Features: Size: 36 x 15 x 16 inches; Weight: 20 Pounds ..., So keep an eye on this thread. There will be ideas for tank mates. Thank you for the information. 8-10 is a pretty good number, they focus mostly on themselves that way. Thank you. I once had a fish person tell me tiger barbs can be deadly if kept in too small a group or too large a group. They said less than 5 and they kill because they are ..., How many fish can I keep in a 180-gallon aquarium? The number of fish you can keep depends on various factors, including the adult size of the fish species, their compatibility, and the filtration capacity of your tank. As a general guideline, aim for a stocking density of 1 inch of fish per 4-5 gallons of water., 2. Optimal Canister Filters for 90 and 100-Gallon Fish Tanks (341 to 379 Liters) 3. Optimal Canister Filters for 75-Gallon Fish Tanks (284 Liters) 4. Optimal Canister Filters for 55-Gallon Fish Tanks (208 Liters) 5. Optimal Canister Filters for 30 to 40-Gallon Fish Tanks (114 to 151 Liters) 6., 35 Peaceful Community Fish For Your Tank (Updated List) by Millie Sheppard. June 8, 2023. 172.9K views. Picking some community fish for your freshwater aquarium can seem a little intimidating at first. With so many options, It's hard to know where to start! The ideal fish you're looking for are peaceful and adequately sized for your planned ..., There are many things that go into calculating the number of fish that can go into a tank. However, a general rule is that you can keep 2 – 4 fish in a 5-gallon tank . Some experts say that you can keep an inch of fish per gallon of water. However, this isn’t always the case, especially if you plan on keeping larger species., Harlequin Rasbora. Mirko_Rosenau/Getty Images. The harlequin rasbora is a small, schooling fish with a vibrant ruby coloration, contrasted with a black marking on the back half of the body, giving them the two-toned "harlequin" appearance. These peaceful fish add a bright splash of color to planted or aquascaped tanks., A 30-gallon tank might sound like a lot, but it's actually one of the recommended volumes that experts suggest to novice fishkeepers. Let's dive in and take a look at what you need to know about setting up a 30-gallon saltwater aquarium, and which fish work the best in a setup this size. How many saltwater fish can I put in a 30-gallon tank?, If that is the major thing you need it for, you should add 1 tablespoon of aquarium salt into every 5-gallon of water. So, the bigger the tank, the more tablespoons you add to it. This rule applies to freshwater generally without irritating the fish living there. 2. For brackish water., 15 Fish in a 10 Gallon Tank. Having 15 fish in a 10 gallon tank is not recommended because it can lead to overcrowding and stress for the fish. Crowded tanks can also create poor water quality, which can be detrimental to the health of all the fish. To ensure that your fish are living comfortably, it is best to have no more than 1 inch of full ...