Add to Cart Quick view Applied Biochemist Black Algaetrine algaecide 1 quart bottle Applied BioChemists MSRP: Now: $29.00 Was: Black Algaetrine™ algaecideThis 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... MSRP: Now: $29.00 Was: Add to Cart Quick view