it is a very good idea and i have thought about them however i dont have the room for them, with the breeder tanks i can make a stand that holds 3 tanks and will be able to have 6 breeder tanks! if i do a cattle troph i can only have one, i normally have 3-4 pairs breeding at once and atleast that going back into my 300 gallon! i keeo rotating them cus i was loosing alot of females keeping them in their own tank