Contains essential chemicals for maintaining clear and hygienic water Helps to disinfect water and stop any foaming Testing strips to check water chemical levels are correct pH Plus and pH Minus to increase or decrease chemical levels The Lay-Z-Spa Chemical Starter Kit contains 500g of rapid-dissolving Chlorine Granules which disinfect spa water, eliminate bacteria and kill harmful organisms by producing free active chlorine (FAC). It also includes a 500ml bottle of Foam Remover, to prevent build-up of that foamy substance formed by body oils, moisturisers and aeration. Twenty-five Dip Test Strips are also included, to check that the alkalinity, chlorine and pH levels of your spa\'s water are suitable for kicking back and relaxing in. To maintain a consistent pH balance the Starter Kit contains a 500g container of pH Plus and a 700g container of pH minus, which can decrease or increase pH levels (ideally between 7.2 and 7.6). CONTENTS: 500g Chlorine Granules for disinfection of water 500g pH Plus for increasing pH levels of water 700g pH Minus for decreasing pH levels of water 500ml Foam Remover for preventing and controlling foam 25 Test Strips for testing alkalinity, chlorine and pH levelsInstructions should be carefully followed at all times