My setup: 20 gallon tank CHE on thermostat that keeps ambient temps around 78-80 degrees. Under tank heater on thermostat controller set on 92 degrees however temped it and come out to around 91 through the glass. I put styrofoam around three sides of the tank with a fourth side I add in the night to avoid any potential cool air coming in. I don’t have a room to keep the temp at a constant 80 degrees at our house. So in the night time he has full privacy and its more like a tub. I also put aluminum foil over most of the netting top of the enclosure since I saw someone recommending it here with a wetted towel underneath to add some humidity. Seem to work well and so far haven’t had an issue with humidity however it’s been super wet outside these past few days and I’m sure that adds a lot of humidity to the air inside.