The Hassle Free Kit combines two important opening and closing products. Pool Magic+PHOSfree contains all natural enzymes that break down organics to make opening and closing fast and easy. A quick clean up to start off the season and prevents organic staining and phosphate build-up in the off season. Pool Magic+PHOSfree contains SMARTZyme technology. METALfree is a highly effective metal deactivation agent that prevents staining and discoloration from tract metals such as iron and copper. These trace metals may already be in the pool fill water or in water added to maintain water level. METALfree should be used as part of a well designed pool maintenance program. METALfree does not raise phosphate levels in pool water.