i think you should put in an arowana

theres a lot to choose from...its kinda impossible for us to list every species that you could put in your tank. I'd go w/ the african dwarf frogs though. that'd be pretty cool. you can even get albino african dwarf frogs. i had one once. it was really neat
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Current setups: 1800 gallon koi pond, 10 gallon planted, 150 gallon reef, other FOWLR tanks