We had a major thread algae problem in our small 500 gallon pond - we tried water changes, microbes, shading but nothing worked. The professional had to install a branded solution dispenser, but it turned out that he simply filled a bottle of Microb-Lift. In any case, if you give a little every day with the AquaScape automatic dispenser, after 2 weeks you will have clean water and nothing to worry about.
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