Would like to share above idea... Very simple project and ease your mind when you out from home for 1 or 2 days away from yr tank. Air aeration during a black out or power outage only and Charging when power on. Being trying on DC battery operate air pump and DC Pump. Below r the piece parts used. 1. DC battery operate air pump 2. 1x variable resistor (4.7k ohm) 3. Automatic Emergency Light (need to dis-solder one point for Air pump/DC pump) DC operate Air pump (modify to ex