We use bins for our 18. We use UTH and herpstats. They are in a room to themselves so it is temperature and humidity controlled with a heater/humidifier hubs got from somewhere. The hot part of the tub is at the back, the cool at the front.
Using tubs eliminates the need for hides and BPs don't require heat lamps. We actually had a snake that refused to eat. Bought our first rack system...put him in...he immediately started eating and hasn't stopped in 2 years!
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