Freshwater fish care and tank mates, with the reasons
Care facts cross-checked across several sources, and tank mate verdicts that show every check behind the answer.
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I have a 10-gallon tank →What fits, which fish work together, and what outgrows it.Find tank mates for my fish →Verdicts with the reasons, for every species we cover.Choose my first fish →Hardy, forgiving species for a first tank.I'm setting up a new tank →Cycle it first: the step most beginners skip.
Most-asked tank mate questions
Betta tank mates by tank size
Compatibility checker
Add the fish you have or plan to buy to check water ranges, tank mate conflicts, and minimum tank and group sizes.
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Cross-checked factsEvery value comes from several references, quoted on each page. Values that drive verdicts are always reviewed.
Verdicts that explain whyTank mate answers show each check behind them, by tank size, so you can judge your own setup.
Growing every week11 species today. New species and guides are added weekly.