Once the river has re-established its natural balance, it will have the ability to clean itself of contaminates far more efficiently. If the source of pollution is not eliminated then you should install a permanent, smaller aeration/system to keep up with the problem. We supply this type of system. It is a low maintenance and inexpensive system to keep in operation. We are actively working on a solar/wind power/tidal/river current system for this very purpose.
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