I have cleaned my pond tested the water it is perfect have a band new water uva but my water has gone green again i have about 14 koi in there and can not see them again any help would be much appreciated
One way to get your pond to stop turning green is to STOP cleaning it.
Do give us more information about your pond - how many gallons, how old is the pond, how big are the fish, what kind of filtration. All details will be helpful.
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