got a ap economy rack that holds 15 and 32 quart tubs and got both my balls in 15 quarts. female weighing about 450 and male about 370. so at what weight should I move up to 32 quart? ive seen different things obviously some wrong like a hatchling in a cb-70 which I don't personally don't agree with. whats everyone elses opinion on this matter and what size do you move up tubs. thanks