Hello everyone, my grand father has a 5 gallon tank with 2 convict cichlids. Well, he has given it to me since his health has declined, and im not sure what to do? I think a 5 gallon is pretty small, but since they are highly aggressive, I don't want to put them in my other tank. It is a fully planted tank, and i do a 20% water change at 10 p.m. after work every 2 days. Will it work? They seem pretty happy and never fight with each other. It has a 10 gallon filter on it along with an air stone and heater.