When I first got my 10g I was planning to put some harlequin rasboras in it. Well the lfs didn't have any and I didn't know at the time that they would order them for me. So I bought what they had, which was pristella tetras (I wanted schooling fish). Now they have the rasboras and after seeing them today I'd really like to have some. BUT I wasn't sure if it would be overstocking if I move my 4 pristellas from the 10 gallon into my 20 gallon (you can see what is already in my 20 by checking my sig line) so that I could put 6 rasboras in my 10 gallon. Would the 20 gallon be too overstocked? Should I just stick with what I already have??