The Tropical Science Phosphate Filter Pads for Red Algae are safe for all aquariums including fresh and salt water, reefs and tanks with invertebrates. Contains no alumina or aluminum oxides. Great for removing cyanobacteria, red algae, and hair algae. It will quickly remove 2 ppm phosphate from up to a 120 gallon aquarium and has been formulated to maintain very low (less than 0.05 ppm) or undetectable levels. It is compatible with all aquariums products, removes only phosphate and add nothing to the aquarium water. Comes with a powdered additive with scoop to treat red and green hair algae. Pads are compatible with all types of filters, including power filters, canister filters, and wet/dry filters & sumps.
Directions For Use: Place 1 pad anywhere in filtration system. Fold into any shape. After 24-hours discard first pad and replace with second. Discard second pad after 48-hours. PF100 requires the use of Erythromycin Thiocayanate, which is supplied and should be added to the water in small amounts as directed.