Have a baby dog face I need to grow out before it goes into my big tank and want to do it in a 55 with some other predators. The fish can be small enough to stay in the 55 forever or go into my 6x2 tank when to big for the 55. Any eels you would suggest? Any other predators? I’ll also be growing out a very small koran angel In this same 55 gallon until she is about 3-4 inches.