Hi I have a 20 gallon tank that I cant seem to get warm enough. The temps are suposed to be mid to high 80's on the warm side and mid 70's an the cool side and an over all temp of mid 70's at night. Im using an under tank heater that keeps the warm side ground in the high 80's but my problem is keeping the air warm. In the day I was told to use a 75w basking light and a 100w blue light at night. Well that barley cept the warm side at 70 day and night so I went back And the guys at the shop told me to get a 100w ceramic heat bulb and run it 24/7. Now my warm side is still only at 80 degres. This seems like alot of power for not much heat (not to mention its killing the humidity). The domes are sitting right on the screen. My home is pretty cool this time of year. Any Ideas of things I should be doing difrently. It dosnt seem right.