Does the aeration system have to run continuously?
During the winter months your compressor units should be run continuously to prevent any ice blockages from forming in your air line. You will also have much healthier pond in the spring as cold water holds much more oxygen. Fountain type aerators should be removed and stored for the winter to prevent possible damage to the unit. During the summer months both compressor and fountain aerators do not have to run continuously although it is often beneficial to do so. The most important time to run an aerator during the summer is in the pre-dawn hours, as this is when oxygen levels in your pond will dip to their lowest levels. Running compressor type aerators at night can have the added benefit that the air you are adding to your air is cooler and so will not warm up your pond as quickly.