Algae Preventative: Algae Complete is BioGuard's most complete algicide. It is a new weekly, dual-action algaecide formula that uniquely combines the benefits of both polyquat and copper-based algicides to provide broad-spectrum control of all types of algae, including green, mustard, and black algae. Dual Action: It can be used as both a preventative and a remedy solution so there’s no need to buy and use multiple products. Fast-Acting: Algae Complete delivers solid results in as soon as 24 hours. Unlike lesser algicides, Algae Complete will not foam and the copper is chelated, so it can’t drop out of solution and potentially stain your pool surfaces. Compatible with Most Pool Sanitizers: Algae Complete was designed to be compatible with most swimming pool sanitizers, and is a non-foaming product. When used correctly, this product is profoundly effective. Tested and Proven Effective: BioGuard products are known for delivering reliable results and making pool care easy. BioGuard carries an extensive line of pool solutions for all needs.