Cutrine-Plus, in it granular form, is a safe, convenient, and ready to use algaecide that treats blue green algae species such as Filamentous, Planktonic, Nitella, and Chara algae. No water restrictions and no wait time is needed before human and animal consumption. Cutrine-Plus granules is the same copper-based formula as original Cutrine, but formulated for control of bottom growing algae. Cutrine-Plus begins to work immediately upon contact and is 100% water soluble. As the granules sink to the bottom they release over a period of time and offer protection for up to 5 weeks. Cutrine-Plus granules work by breaking down the plants, prohibiting photosynthesis with noticeable results in 24 to 48 hours. Use it to treat irrigation systems, pools, ponds, drinking water for both animal and human use, reservoirs, lakes, canals and ditches.