Definitely feed in tank, safer for you and your snake. I agree with the above that analog thermometers are inaccurate, a good reliable temp gun or digital thermometer with probe like the acurite 00891 would be good to buy. I didn't see you mention a thermostat, do you have one for the uth? While bps don't need special day light mine are kept in a dark room but I use dim lights to offer day/night cycle so I would use a lamp dimmer with the day light.

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