I have a friend who has a convict in a 10 gallon rectangular tank. He does regular water changes every 3-4 days. He has a filter rated for a 15 gallon tank on the 10 gallon. The cichlid is very heathy and the tank looks good. He doesn't have anything else in the 10 gallon besides the convict. He has lots of rocks in the tank and a few plastic plants. He keeps his heater at 80F, is that an ok temperature? Is it ok to keep the convict in the 10g. I think its a female, but Im not sure.
http://cichlidresearch.com/simpleaquarium.html
http://cichlidresearch.com/simpleaquarium.html