Algea in waterfall

Discussion in 'Water Features' started by jnd42697, Aug 20, 2007.

  1. jnd42697

    jnd42697 LawnSite Member
    Messages: 7

    [​IMG]I built this pond in my backyard two years ago. It is about 6x6 and the fall is about ten feet. The problem I am having is a large amount of algea on the rocks on the falls. I have a submersible pump and filter and a UV clarifier that keeps the water crystal clear. What can I do for the algea on the rocks.

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