20 Gallon Fresh Water Aquarium: Community Fish Tank

The 10 worst community fish are:
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Our peaceful community fish include many Tetras, Rasboras, Guppies, Platies, Swordtails, Plecos of many species, Cory Cats, Gouramis, Rainbowfish, several barbs and more.
Things to remember when feeding your Freshwater Community fish:
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Species that are considered “community fish” are those that have peaceful temperaments – fish that are likely to get along with other species. Most of the fish that fit into the “community fish” category are schooling or shoaling species. Schooling species of fish are those that swim together in coordinated groups, facing the same direction. Shoaling species are fish that swim independently of one another but in a way that forms a kind of social group. For the most part, community species of fish are peaceful by nature, though some species may display aggressive or territorial behaviors when two males of the same species are kept in the same tank. Keep reading for a list of peaceful community fish for all aquarium sizes and every water layer!
Photo provided by Flickrvery very very helpful!! I now know what fish to put in my community tank. Good job
Photo provided by FlickrGood Parents, easy quick breeding, peaceful community fish, wet spot sells them for $10 each
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There are naturally no strict rules when it comes to setting up your first community aquarium and how you decide to go about will depend on personal preferences, budget, how much time you have to spend on your hobby, the short term and long term goals of your fish keeping and so on. This article will therefore only offer a few suggestions and guidelines. It should also be noted that these guidelines are constructed with a 120 liter aquarium in mind. If you aquarium is smaller than this, you will have to make some adjustments. Zebra Danio - The Care, Feeding and Breeding of Zebra Danio Fish Known to jump and need a school of at least 5-6 fish. Great community fish with minimum tank size at 10g. Very hardy. Tolerates temps 65 - 77 degree water. Will grow to 2.5"Danio margaritatus (Celestial Pearl Danio) - one of the few schooling/community fish I like, but remarkable because they're colorful, tiny and fast. I'd have these now except that they're incredibly expensive ($5-7 each x ~20 for a school...)Male Crowntail Betta. I had one in my 25 gallon community tank with neon tetras, red minor tetras, and platies. Bettas do great with peaceful community fish.Harlequin Rasbora Max size 2" Peaceful 72 - 77 degree tanks. Fills upper areas of aquarium with movement that is lively and vibrant. Prefers established planted aquariums with open areas for swimming. Should be kept in schools of 8 - 10 and can be housed with other community fish. Might be an option for the 20gCommunity represents the largest collection of fish under the freshwater banner. The term “Community”, however, seems to inspire misconceptions. Within the Community category, you have a wide variety of species with differing levels and types of aggression. The most common misconception is that all community fish are compatible and get along fine. This couldn’t be further from the truth. There does not exist a completely harmless, non-aggressive species. All species lie somewhere on the sliding scale of aggressive behavior. But, the one thing that defines a “Community” aquarium is that it is populated with varying cohabitating species. It is important to understand the aggressive tendencies of the species you are considering and this is one way The Ocean Floor can help! It is important to note that live animal individuals can sometimes defy recognized special tendencies too. Community also includes many species commonly referred to as Semi-Aggressive and Brackish.