Males could stay in that size their whole life except for the abnormally large ones lol. And female bps would be ok up until 2000grams then most people move them to a 41qt. Some people keep all their balls in just 32qts or keep males in 28qts and females in 32qts. Whatever works for you really. Right now I have all mine in 41qts because thats just the size rack i built...