Enjoy a hassle free pool at the beginning and end of the season! Natural Chemistry's HASSLEfree kits contain two essential products. Open and close your pool using the 1L bottle of Pool Magic+PHOSfree and 1L of METALfree. What does this kit do for your pool? Open a clear pool in the Spring! Greatly reduced spring maintenance Less scrubbing and cleaning Preserves mesh and vinyl pool covers No phosphate build-up during off-season and the list goes on... Pool Magic's natural enzymes, like those found in your own body, are designed by nature to break down or biodegrade organics. The enzymes in Pool Magic literally break down organic waste to basic elements like carbon dioxide and water, that are then easily absorbed by the pool environment.The benefits of Pool Magic are combined with PHOSfree to remove phosphates which are continually entering your pool. Phosphates are a limiting nutrient for algae growth. By starving algae of its primary nutrient its growth is inhibited. The small combination pack contains 1 liter of Pool Magic+PHOSfree and 1 liter of METALfree.METALfree is a fast acting and highly effective metal chelator that does not contribute to raising phosphate levels. METALfree helps prevent all staining and discoloration due to high metal ion content in pool water and pool fill water.