Quote Originally Posted by smakemom View Post
Ok, so I worded the fluctuation badly. I have to adjust my stats at least once a day, because of the temperature of my house. The cool side is usually fine and shuffles between 75º and 80º but can sometimes dip below 70 or rise above 80 depending on the house. I also have a huge window that affects my room temp. I will be moving soon to an environment with a much more stable temperature, thankfully, but until then my room is the only place for him.

The hot side is the bigger problem. It's true that it can fluctuate about 10º a day, but not all at once! That would definitely be a shock. It only wiggles about 5º up or down at a time. But again, because of my house, I usually have to adjust that side once a day. (I only set it one more degree above or below- that's enough of a change to fix it, usually.)

Hopefully that makes more sense.
From the sounds of it, you're not taking the surface temperatures of your tank which is what you need to be concerned with. You can achieve this by using a temp gun. I say this because I don't think your house temperatures are going to influence huge 10 degree swings in surface temps; especially if you have a working thermostat controlling your heat mats. It sounds like you may be using a regular thermometer to take air temps inside your tank. Does this make sense?