Hi all, I have a pair of convicts in my 30 gallon tank along with my 4 inch oscar and my pleco. There is no doubt that one is a male and the other is a female but they just will not breed. I have tried many things. I started off with the water at 72 degrees and raised it 2 degrees every week. I am constantly changing the water, I feed them plenty and in a variety (fish flakes both tropical and goldfish, freeze dried bloodworms, pellets, and live worms). They have been together in the same tank for about 2 and a half months now. The female is 1 1/2in and the male 2in long. The temperature is currently set to 80 and the male is always chasing the female but that's all. Any suggestions?