We had a watermeal invasion that would cover the pond during low water throughput. We installed an aerator and 4 years later the watermeal is still present but not a problem. I would like to say that it helped wit the algae but I can't be certain. We generally have one major spring bloom that we mechanically remove(or a storm removes) and then its not bad the rest of the year. The pond is old as it was a irrigation pond for the fields that now contain our development. It is 1/2 acre and bean shaped but around 10 ft deep throughout except by the inflow side and around the edges.
