API Phos-Zorb for API Nexx & Rena Smartfilter - Size 6 - 5.25 oz - (Treats 55 Gallons)

API Phos-Zorb for the API Nexx and Rena SmartFilter selectively removes ammonia, nitrite, and nitrate from freshwater and saltwater aquariums. It also removes phosphate, a by-product of fish metabolism and decaying organic matter and an additive in some tap water supplies, aquarium products and filtration media. Easy to use filtration media. Eliminates cloudy water caused by phosphates. Will not remove trace elements and will not affect pH.

Sizing: Size 6: Aquariums up to 55 Gallons.

Directions: Each pouch is effective for up to 2 months. Change regularly for maximum effectiveness.