So im thinking which would be better a 20L or a 30L (gallons) for a divided up male tank? I could put a few males plus have big enough spaces that they could have friends!!! which do you think would work better? plus how much (us dollars please) for tank, hood,dividers,filters? i have five males and i am so getting some more of them so need more room. it would be so nice to have them all in one stop with a light to enjoy them. What color gravel should i use or sand? this is so going to be so neat!!!! Ill make it as natural looking as possible. i cant do it now but i can start pricing!!