Pond Boss Forums AERATION Systems questions Windmill Choices for Pond Aeration

If you have to have a windmill, a client has Koenders but there WAS a 2 week period last Feb that had overcast days, fog and little wind. The only pond that had a fishkill was the pond that only had a windmill aeration system. The other ponds, in addition to the windmill aeration system had electric aeration systems too.