I have recently built a fully bioactive 40 gallon WTF vivarium and now have to juveniles living in there. I have a 150w submersible heater and a 75 heat bulb and for the life of me i cant get the temerature above 26 degrees a spends most of the time around 23-24. I also cant get my humidity right, im aiming for atleast 60% but struggle to get it below 72%. I have an exo terra tank with mesh top so ventilation isnt an issue