Laguna Phos-X is specifically formulated for freshwater ponds to reduce many of the compounds that encourage unsightly water conditions and foul odors. Phos-X absorbs and traps phosphate, nitrite and nitrate, gradually and safely. As a result, your pond water will be crystal clear and provide ideal living conditions for fish and plants. Phos-X is easy to use and greatly reduces hands-on pond maintenance. Simply place one or more packs of Phos-X in the pond filter to maximize its effectiveness. Each 32 oz. sack treats 2500 liters.
Directions for use: Simply place Phos-X in the filter or wherever water will circulate through the mesh bag. Replace after 3 months or when algae starts to reappear
If you have a quartz sleeve make sure and clean it with acetone when you change your bulb to truly have a clean quartz sleeve. As a general rule of thumb, you should change your UV bulb after about 8,000 hours use. This is about once a year.