with that info I can offer some more advice.
The thermometer you're using is not going to measure the temps where you need to. 95 in the hide is fine, but 85 outside the hide on the warm side is too low. If temps are not high enough, they can't properly digest and won't eat without the right temps. Aspen is not good for holding humidity. It's a good substrate for corns because they are lower humidity snakes. Cypress is better for Ball Pythons if you want a lose substrate.
What are you using for heat on the warm side? I'm guessing an under the tank heater? If so, be sure you have something between the bottom glass and the aspen (newspaper, reptile carpet, astroturf, etc)- your snake could easily burrow below the aspen and find himself basically on top of the heating pad. Those pads get hot and can burn him. You need to measure temps under the aspen - since that's what your BP will feel. Your cool sides are way too low. Make sure you have a thermometer on each side of the tank to have constant measurements. I recommend the digital probe kind - that way you can stick the probe exactly where you need to measure and get an accurate measurement. Since you're measuring on top of aspen, maybe when you measure in the correct place (belly temps) you might find the temperature more where it should be - but it may be too hot without a dividing layer).
In case you weren't aware (you might be, but figured it wouldn't hurt to throw this in), with that tank size you should expect to have to get a bigger tank - probably by the time he hits 1 year of age.
As far as humidity, 50-60% is fine when not in shed. Shoot for 70 when in shed. It's really one an issue during shed. You can actually not worry about it and just add a humid hide on the warm side when in shed (or leave it in there for a nice hide all the time, since you need a hide for the other side still).
Again, if you don't have the right sized and enough hides on both sides of the tank your BP will not feel secure - leading to the stress, illness....
I hope to get an okeetee soon - they're gorgeous! I'm actually planning on buying a Boaphile cage for my Ball Python and putting an okeetee in his current 50 gallon breeder tank.
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