they have bred many many times, but the fry usually die. I have 6 offsping. The male has developed a hump, and definately is bigger. It's not the size of a fontasa hump, but definately a hump.
I don't change the water that much at all. I run a sponge filter, and 2 wisper power filters. and 2 heaters.
they seem to like cooler temps like 73-74, where my Mubma tank runs about 80F.