Sad news, we have been without power for a few days now. With the heavy rains came flooding and a power outtage in our area. Sunday night woke up to the emergency back up power running the tank. Got up to check everything and all seemed to be running accourding to plan. Two batterey opperated air bac paks kicked in and the pumps and heater plugged into the back up power supply. What I hadnt thought of was the heater is 300 watts and that kicked the power off. Had to unplug the heater and just run two pumps. After an hour the power still didnt come on and we started to worry about draining the power supply so switched to one pump. The worst part was watching the temp drop slowly. At about two hours the power ran out and we were forced to think of other power supplies. Have an inverter to the car, that also just ran the pumps but we didnt want to run the car indefinetly. Into the morning we figured power wasnt coming on anytime soon and got the generator outta the motor home. Ran all the pumps and heater off of that for two days. Today I need to see what was lost and check all my parameters. I think the most stress came from the temp dropping to 70 then when we plugged in the heater the temp rose too quickly.