Quote Originally Posted by Tripppysmurf
Yes I am shutting the heat lmap I have off at night. .
Well that explains your night temp drop. Why not switch to a CHE that you could leave on all the time? This would stabalize your night temps. As a trick you can regulate the tank temp by how high up to place the CHE over the tank. The further away the lower the temp the closer the higher...you can tweak it from there. This is just a short term stop gap till you could get a thermostat.