I have an Apex Jr on order which will arrive next week. I have been reading the manual so I have an understanding of how to program it when it arrives. Electrician coming today so it will be hardwired. The heater I currently use with my system has a temperature setting, if I use the Apex Jr to control my temperature at what setting should I put the actual heater on? For example if I want my tank to stay at 78 should the heater be set on 78 or something different?