The bigger footprint of a 20 gallon long makes these two areas bigger. There are two different 20 gallon tank shapes: high and long.Ī 20 gallon high is better suited to mid-water fish so there’s more room in between the surface and substrate.Ī 20 gallon long is best for fish that primarily inhabit the top swimming area or live along the bottom. Step 2: Choosing The Best 20 Gallon Fish Tank & Equipment Then they can spread out all over the tank instead of everyone trying to crowd into one area. It’s a good idea to mix fish which prefer different swimming levels. You’ll see different species listed as top, midwater or bottom dwellers. Swimming Level – not all fish live at the same level of the tank. You’ve got to make sure that territorial fish are going to have enough room to be happy so they’re not bullying everyone else into a corner because they feel crowded. Territory – some fish like to stake out a little territory and defend it against other fish. Schooling fish should be kept in groups of 5 or more so they feel happy and secure. Schooling behavior – look to see if your fish prefer to live in big groups or if they’re loners. Do your best to match aggression levels so no one is getting beat up. Some fish are just plain meaner than others. Water Parameters – it’s best to put fish together that have similar needs, like temperature and hardness.īehavior – this is the biggest factor to consider when you’re trying to figure out which fish can live together.Īggression – adding aggressive fish to your tank can spell absolute disaster. Building a Community…TankĪ lot of aquarists want to build a community tank, an aquarium that showcases several different species living together. Harlequin rasboras (Trigonostigma heteromorpha) – they mostly want open swimming areas with a few tall plants at the back of the tank. Oto cats (Otoclinus vittatus) – excellent cleaner fish that needs lots of plants and decor that it can scour for algae. Rainbow kribensis (Pelvicachromis pulcher) – use a sand substrate and provide several caves with planted areas and lots of decor so they can stake out a territory. Platies (Xiphophorus maculatus) – prefer densely planted areas mixed with open swimming areas.Ĭardinal tetras (Paracheirodon axelrodi) – slightly bigger cousin of the neon tetra, they prefer lightly planted tanks with tall plants to dart into. They like open swimming areas and sand substrate. Panda cories (Corydoras panda) – adorable dwarf catfish. Ram cichlids (Mikrogeophagus ramirezi) – dwarf cichlids that need a mix of open swimming areas, dense plant clusters and small caves. Here’s a list of a few species that can work in a 20 gallon. That way, you know if it can live in a 20 gallon, what other fish can be added to the tank and what that species needs as far as food, decor, temperature and substrate. Pro Tip: If you’re interested in a certain species of fish, make sure to do a lot of research. You’ll base all your other decisions on what kind of fish you stock, like: shape of the tank, filter size, decor, substrate, plants, etc. Your first step in planning your tank is to decide what kind of fish you want to keep.ĭifferent species of fish have different needs. Last update on / Commissions Earned / Images from Amazon Product Advertising API Step 1: What Do You Want to Stock? Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml Python Pro-Clean Gravel Washer and Siphon Kit for Aquarium, Large Marina Aquarium Kit - 20 gallon Fish Tank - LEDĢ0 Gallon Long Aquarium, by Aquarium Masters, for Marine Fish, Invertebrates and Tropical Fish!.ĪquaClear 20 Power Filter, Fish Tank Filter for 5- to 20-Gallon AquariumsĬurrent USA Satellite Freshwater LED Light for Aquarium, 24 to 36-Inch
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