I actually had the opposite problem recently, I was away on holiday and got a bunch of emails from my apex that my tank temp was dropping out of parameters. I called my dad over to unplug my tank heater and plug in the spare. I waited...but the tank temp kept dropping! WTF??? Turns out that I turned down the house thermostat when we left and my 300 watt heater wasn't up to the job. Lucky that I figured it out and called my dad back to plug in both heaters which did the trick. No damage.
__________________
Red Sea REEFER 450
|