Ok well the tank is 55 gallon all parameters are in check. Filtration is a peguin350 w/o biowheels, it has a insert filled with diamond blend media. Teperature was a 78F and I raised up to 80F. I've had easy breeding with Platies,swordtails,mollies,cichlids. But for some reason guppies are giving me a hard time to breed them. Is there some trick I missed?