the original poster said tank size isn't an issue and in fact it is, a 125 can only hold so many fish at only a respectable size, of coarse the original poster needs to take in consideration of tank size compaired to his current stock's adult size. if his 125 is anything like mine, its only as wide as a 75 gallon with a couple more inches taller and 2 feet longer. which is only a run way for a large fish.