females up to 2000 grams will be fine in 32quart tubs. after that it's pushin it though. im about to switch my bigger females over to my 41 quart rack when my thermostat gets here. here's a size comparison. the female is 1800 grams and the male is 1400 grams and they still have plenty of room to do their thing. if you plan on breeding you really need some 41 quart tubs though. if anything, build a 32 quart rack and have your few bigger females set up in single tubs.
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