Swapped new BP over to tub instead of tank.

[steez]

No that is not normal tubs transmit most of the heat typically I would expect to see only one degree heat loss. The temp should be measured on the floor the hottest part should not be above 94º with tubs typically I would not set a t-stat above 94º. The second thing the hot spot should NOT be 1/2 the floor space It should MAX at 1/3! This should be adjusted.

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What is the cool end temps and air temps?

I think I have too much substrate or something because my cool end temp is only 76 right now and that is way too low. My hot end is mostly 83ish, which is also too low. If I IR gun the actual plastic above the UTH it's 92 right now.

I just took a bunch of the aspen out and made a consistent thin layer, I'm hoping this will get the ambient air temp up a bit in there for him.

The second thing the hot spot should NOT be 1/2 the floor space It should MAX at 1/3! This should be adjusted
I decided to cover 1/2 of the floor space because I live in Idaho and it gets very cold here during winter. Also the 1/2 is still not heating it up for me enough in there. I have the thermostat set at about 98 and the plastic temp is 92 with ambient air too cold.

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You don't want the surface of the substrate at 90. You want the surface temperature of the tub under the substrate at 90. Your snake will get to it when it needs to. The thickness of the substrate on the hot side should not be thicker than about 1/2 inch.

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This is what I'm shooting for, but I feel like 76 cold side, 83 warm side is a bit cold in there for ambient temp. I've seem to of hit the sweet spot of 92-93 on the PLASTIC by having my thermostat set at 98. The probe from the accurite is sitting right on the plastic above the UTH as well, and it's reporting 91.

Maybe I should close up some of the vent holes so the heat stays in better?