Applied Biochemist Black Algaetrine algaecide 1 quart bottle MSRP: $39.00 This formulation was specially designed to fight tough black algae. Contains copper and exclusive penetrating agents to kill and prevent the growth of even the most deeply-rooted algae cells. It... Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP: $39.00 Subtotal: Add to Cart