we have a 75 gallon tank, 48"longX18" deepx22"tall. screened tops. we have a large UTH on a rheostat under 1 side and a mini double dome over the other with 75 watt bulbs. 1 day bulb and 1 black heat. timers on the bulds change day to night at 630 p.m. and vica versa. sometimes we use towels over the screens to help stablize the heat and humidity. so far they stay pretty consistant with no intervention. we are BRAND NEW bp owners so this is all new, but this is whats working for our 53" baby! we plan on getting an actual thermostat soon to regulate temps better through the winter as it gets colder.
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