I had a problem with my Red Sea 350 tank and replaced my heater with a new Eheim Jager 200 watt heater. It is plugged into my Apex. I am having problems with the heat fluctuating up to 2 full degrees in a 24 hour period. I have the on temp set at 77.3 and the off temp at 78.0. When i woke up this morning the temperature was 76.7. I really need help as I have tried multiple setting on the Apex to keep the temperature more stable. Thanks in advance.