Directions for use: NOTE: For DE filters, add recommended dose to the pool water NOT the skimmer. 1.Clean or backwash filter 2. Apply appropriate dose as directed by dosage chart below 3. Shake bottle well and with filter pump running add dose directly to the skimmer 4. Clouding of pool water may occur when adding this product. After 24-48 hours, vacuum pool surface to filter *Important Do not add more than 1L (33.9oz) at a time For higher dosages add 1L (33.9oz) every 24 hours until desired result is obtained Note: It is important to retest pool water following completion of each phosphate removal treatment. Repeat if necessary, until phosphate level is below 100ppb Note for DE filters: if pressure is high, turn filter off for 30 seconds and turn back on. This will help alleviate some of the pressure