I got 5 convicts in my 20 gallon all are about 1-2inches right now. I have so many hiding spaces for them that I feel I will be fine when it comes to breeding and if they gonna be crazy when they breed well I got a 5 gallon bucket with filter and aretor for them! I feel it depends on the fish cause when it comes to chiclids no 2 have the same personalty:feedback: