You can use both, but the under tank heater MUST be regulated by a thermostat and monitored by a probed thermometer. (The second thread I linked in my first post goes over this stuff in detail)Originally Posted by Zombietox
The most important thing is that your cage temperatures are stable and correct
(90 hot side, 80 cool side a few degrees either way isn't going to hurt, but the cage shouldn't ever get below 75 or above 95)
Keep in mind that UTH's only heat the surface they are attached to and not the air in the cage, your heat lamp is what controls the air temperature in the cage. Also UTH's require you to have a very thin substrate layer, 1/2" or less.
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