[laverda]

The apex is way more reliable then any heater I have ever used. However you should not have your apex turning the heater on and off thousands of times a day. I suspect you have your heater too close to your temperature probe and have the range set to tight. If your fosh are health they can deal with a 4 degree temp swing daily. So set your heater for a 1-2 degrees between on and off. Set you fans or chiller to come on at least 3 degrees hotter than the heater off temp. Again give a 1-2 degree range. To do otherwise your just wasting electricity and wearing out your equipment prematurely. Both the heater snd chiller should away from the temp probe. If you heater is in the first chamber of you sump and the temp probe is in the second. It is only going to heat a portion of the 2 sections before the probe shuts it back off, whil the tank has not really been heated at all.