Using API Algaefix cleared up my pond completely. I also use a UV clarifier. With Algaefix, you need clean filters and good pond aeration to avoid low oxygen levels which could kill fish.
Use a UV lamp in line in your filtration system. It kills the small pieces that float around and then anchor everywhere. I have had a pond for 24 years. I got tired of all the other stuff that fail.
I used barley extract. It is a liquid that keeps the water clear and my animals can drink from it. Ask Hank or Hank Jr... They will help you.
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