His birthday is October 27, and he wants a Jack Dempsey. However, the aquarium I am going to give him is just a 10 gallon. Are there any other meat eaters that can survive in a 10 gallon? if not, I will just give him a jack dempsey and then once it gets to big give him my current 30 gallon. also, i haven't set up the aquarium yet, but i am planning on doing it either today or tomorrow. will that give it enough time to cycle before i get the fish on his birthday?