I still feel like there is something shady going on with my heater and or thermometer.
I went to the aquarium yesterday and got a fancy digital thermometer (where the end sits in the water and the digital device is outside if the tank), and I have come to the conclusion that the heater is the culprit!
It's been set on 26 since last night and the highest it's gotten is 24.5 and is constantly fluctuating 1-1.5 degrees.
This is bad yes? It's a 25w heater.
So now I'm testing his old 10w heater to see which is the lesser of two evils until I can go and get a new heater next week!