Just wanted to know what are some expensive fish that would be good for a freshwater aquarium? I saw a few at my lfs and just wanted to know prices, looks and sizes of any freshwater fish. Thanks!
Nah man, there are TONS you can do in a 20. Just not a lot of room for variety. Tetras, rasboras, dwarf cichlids, cories, barbs, livebearers, list goes on and on.A 20g tank dramatically limits what you can put in it, as it's too small for many single fish. Additionally, other species which, by themselves, would fit in a 20g, won't be healthy or happy in less than a school of 4-6, which might be too much for a 20g.