First thing is I would get more Cyps, they do better in large schools. And if it was me I would not put the Lithobates in with the Cyps. I had Z-Rocks and when it came to breeding the dom male was a real [email protected]# H^&#. he would attack what ever he could and he would not stop untill he got what he was after. As far as the Steatocranus I have no experiance with them.