Algaefix Marine

The only epa-registered reef-safe algaecide.","Controls many types of algae in marine & reef aquariums.","Will not harm marine fish corals or other invertebrates.","Keeps marine aquariums clean & clear.","Add 1 ml for each 10 u.s. gal. or 5 ml for each 50 u.s. gal. repeat dose every 3 days until algae is controlled.","Once algal growth is under control add one dose per week.