I wasn't sure which section to put this in. I'm setting up a hospital tank for my SW fish. I wanted to know if a 20 gallon was big enough. Also wanted to know what all I need for it. If I need to put power heads in it. I'm leaving the bottom bare and putting dry rocks in the tank. Right now my mandarin goby is all that's in it but I was wondering if I ever have to quarantine a big tang or something is the 20 gallon hospital tank going to be big enough? Thanks for any info.