These heavy duty transformers feature a photo eye for automatic on/off. Easy push button settings keep lights on from one(1) to nine(9) hours after turning on - or can be set to run dusk till dawn. (Two per case)
Spare Me! Keep a spare air pump or water pump on hand for emergencies. If your pump ever stops, do not feed your Koi.
Consider using seperate water pumps for your waterfall and filter. This way you will always have a backup, and you can save energy.