Cutrine-Plus, in its original liquid 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 liquid is a copper-based formula for control of bottom growing algae. It begins to work immediately upon contact and is 100% water soluble. As the liquid disperses it offers protection for up to 5 weeks. Cutrine-Plus liquid works 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.