Mine are both TC. In the winter, it's about 82ish during the day, 70 at night. In the summer its about 88-85 all the time. I really don't know the problem. One's in sphag (what it came in) and the other is in peat/perlite/lava rock. I'm honestly getting a bit irritated because everyone but me has huge awesome bicals lol. And with my conditions, you'd think they'd have gotten to that point by now.