Hello
A month back I got an Arizona mt king . He eats well and seems to be happy.
I didnt use an UTH since heat wave in room he was kept in was over 90. Infact I put him in my room with the ac and used a small watt black light over tank screen to keep temp nice for him but not insane heat of room that he was in.
He is back in the den now and temp is around mid to high 70s.
I added an UTH to tank today.
Its located on one side of tank and has average temp of 100 but with temp controller I will lower it to 90.
Should I turn it on already with room temp 75 to 78?

thanks