my first attempt of breeding jack dempseys the fry all got eaten. i thought by the parents. i just had the pair and a small common pleco in the tank. so i started a 20 gallon for the next batch of fry and put the pleco in to help cycle and keep cycled. so the second time around i took half the fry out and put them in the 20. now the tank with the parents seem fine.... but the 20 seems to be dwindling.... the only thing i can think of is the pleco. will they eat fry? i know they will eat the eggs but ive never heard of them eating fry... where are my fry going?