PHOSfloc Phosphate RemoverDON'T FEED THE ALGAE! High levels of phosphate in your pool promote rapid algae growth - or in visual terms, undesirable green water. PHOSfloc is indicated for pools with extremely high phosphate levels. Initial dosing with PHOSfloc will drop phosphate ppb to more manageable levels.Use to treat the following symptoms: Green pool water with high levels of phosphate. Recommended Dosage: 4lbs of PHOSfloc will reduce 4,000 ppb of phosphates to approximately 600 ppb in a 10,000 gallon pool. Regular follow-up treatment with PHOSfree or Pool Magic + PHOSfree will reduce phosphate levels to near-zero.Note: PHOSfloc must be vacuumed to waste or removed from the pool with a separate vacuum pump. PH must be adjusted to 7.2 before applying. Follow directions for product.