BioGuard Algae Complete Dual Action Algicide 72 oz by BioGuard
This unique product contains two algae-killing ingredients, along with additional benefits to make dealing with algae easier for the pool owner. The two algae-killing ingredients in this new product are copper and polyquat. Algae Complete contributes the same level of copper to the water as Banish. With the addition of quat into the formula, however, the product now has two different mechanisms for killing algae.