Kent Marine Power.Phos Phosphate Removal Media - 150 grams.

*Provides the most effective means of removing phosphate and silicate available: never releases them back into the water when exhausted, and requires very little physical space in the filtration system. For best results, use as fluidized media with the kent phos.reactor. Each 150grams will reduce up to 1.0 ppm phosphate to near zero in 150 gallons of saltwater or 300 gallons of freshwater.