I have 3 bn plecos that are in a sixty gallon tank with five Cory cats which just spawned as well (1survivor) the plecos have spawned several times with no success I noticed today that some fry were swimming I caught three and put then in a shrimp only tank. Why have I not had any success before. I am not sure if this time will be different. I think the plecos are two male and one female. Do you have any suggestions that may help me out. I have lots of plants and too many mts snails in the tank too and about ten rcs. The fry are like 3/4 of an inch. How old are they.