This oil-less compressor works well for continuous pond aeration. Its higher pressure allows for aeration in ponds up to 35' deep. Also because of higher pressure, this air compressor can be located up to 2000' from the pond and still effectively operate, making it a good choice for ponds needing aeration but not having electricity nearby. Each compressor comes with a 6' power cord and inlet air filter. One year warranty.
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.