i have a rosequeen wich is a red devil mixed with something and i threw it in with my much larger red texas. they immediatly hit it off. she started laying eggs on a slanted rock within 2 weeks but werent fertilized. 2 weeks later same story so im going on a 3rd time now. either its going to take quite a few attempts or since i have to hybrids one is sterile if not both. i just dont know how many attempt i should give it before i say sterile.