More than a colorant, Applied Biochemists Aquashade Aquatic Plant Growth Control is a precise EPA-registered blend of dyes proven to control underwater aquatic plants. Having gone through rigorous testing and reviews, Aquashade® dyes are specifically blended to block the spectrum of sunlight critical to photosynthesis. This powerful formulation helps to control under water weeds, and if used early in the season can prevent algae and weeds altogether.Pond dye, pond colorant, pond tint, EPA registered, blue dye, aquatic dye, aquatic colorant

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