Poly-OX, red slime remover 4oz, Kent Marine. Poly-Ox is an organic material oxidizer. It will remove the food source of various cyanobacteria (commonly called red or blue green slime algae). It will oxidize leftover food, and dissolved and suspended organic matter. This will increase the water quality and provide a better environment for your fish and invertebrates! Directions: First Read Considerations for use below! Freshwater: Add one dose only at 1 teaspoon (1 capful or 5 ml) to 4 teaspoons per 10 gallons (40 liters) of system capacity depending on bio-load. Can be repeated at 7 day intervals. Marine: (reefs and fish-only systems): Add one dose in the morning and one dose in the evening of 3 drops (use an eye dropper) per 10 gallons (40 liters) of system capacity for up to 10 days [this is equivalent to 1/4 teaspoon (1/4 capful or 1.25 ml) in a 60 gallon tank, twice a day]. Carefully observe inhabitants each time. If invertebrates close up at all, then half the dosage and use longer if necessary. DO NOT EVER OVERDOSE! Product can be squirted, slowly, on affected areas using a plastic syringe, and this is sometimes faster and more effective. This method also doses the entire tank, as well. Do not use again until time to dose again and do not exceed the above recommended dosages overall.