I have a 55 gallon tank with 2 juvenile jack dempseys. Im thinking of buying a pair of black convicts for breeding purposes. Based on this article, it seems ok to have JD in the same tank as Convicts. My question is, once the fry are hatched, should I move all the fry and mother to a new breeder tank(which i dont have)? Or will the JD eat all the fry? Since the Convict parents will defend the fry, wondering if ok. Also, my tank is 20 inches high,,,,so concerned the fry wouldnt be able to swim that high.