How do I get rid of foam on my Koi pond?

Koi pond has foam on surface

My thousand gallon Koi pond has started to get a foam on the surface and the water is not as clear as it has been.  For a long time the water has been very clear.  I recently changed the UV bulb but other than that I am using the same pressure filter, UV light source, and pump. I don’t see any improvement from changing out the UV bulb.

3 Responses to "How do I get rid of foam on my Koi pond?"

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