Join Date: Jun 2011
Location: Nova Scotia, Canada
I wouldn't house two females together in any tank honestly, to much of a chance of aggression. With two females, one will be the Queen and she will eventually harass the other female. I had 3 in my 20g tank while I was waiting for my new females to arrive, and one of them tore the fins right off my oldest girl :( Sadly she did not make it. It's not so much ammonia or space, but the fact that females NEED to be in larger groups to space out aggression. Personally if I couldn't upgrade, I would divide the 5g and keep them apart.