Depends on the snake. I usually upgrade hatchlings to 16qt tubs at around 200 grams. But if theres a snake who is a really picky eater or sensitive in general, I keep them in their current tub for a longer time.
This is my weight to tub ratio:
Hatchling - 6 qt
500 grams and smaller- 16 qt
500- 2000 grams - 28/32 qt
2000 + grams and large females - 41 qt
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