Tropical Science Phosphate Filters will remove 2 ppm of phosphate from aquariums up to 120 gallons. Once in place, they can maintain phosphate levels ranging from at or below 0.05 ppm to levels that are undetectable. The pads will only remove phosphate and will leave behind no residual chemicals. Pads are compatible with all types of filters, including power filters, canister filters, and wet/dry filters & sumps.
Instructions: Place filter pad anywhere in the filter system or aquarium. Fold into any shape. Keep second filter pad sealed in bag. After 24 hours discard first filter pad and replace with second filter pad. Discard second filter pad after 48 hours.