What is a good size tank for an all male hap and peacock tank? I currently have a 75 gallon all male tank with 14 adults and sub adults. The tank is going well aggression wise. However I can tell my bio load is increasing. Having to make bigger and more frequent water changes to keep the nitrates down. I'm thinking about upgrading to a 125(6 ft tank). I have a moorii that is about 5". I'm sure he's going to need more room in the future. I've also considered a 150(24" wide vs 18"). I'd rather go with the 125 if it is good due to the weight. If I go with the 150 or bigger it may have to go in the basement. The plan would be to be to top out at 20-25 fish. Any thoughts on what is good considering appearance, maintenance and the health of the fish?