Orenda CV-700-1QT Catalytic Enzyme and Phosphate Remover Concentrate, 1-Quart Catalytic enzyme and phosphate remover water cleaner concentrate is a unique, stabilized liquid Effectively catalyzes the bio-oxidation of organic contaminants and removes ortho-phosphates commonly found Routine application of this concentrate will positively maintain water clarity Prevent both organic and ortho-phosphate contamination of water Includes 12 container per pack; comes in 1-quart container