SHIMMER COMPARE TO AS POLYSHEEN, SUN WATER CLARIFIER, AND GUARDEX POOL WATER CLARIFIER Enjoy brilliant, sparkling pool water at an economical price! This fast-acting formula coagulates dirt, oil and other debris that cloud the water. Regular use also improves filter performance and efficiency. Start-up dosage: 8 oz. per 10,000 gallons. Maintenance dosage: 4 oz. per 10,000 gallons. Buy 4 quarts and SAVE!