This Clearwater Spa Chemical Starter Kit (CH0018) is a fantastic option for a new inflatable hot tub user as it includes a variety of products to help protect and maintain your spa as well as a useful guide for safe and effective water treatment. Chemical water treatment for your Lay-Z-Spa is essential regardless of how long or how often you plan to use the hot tub for. The kit includes 500g Chlorine Granules for disinfecting pools & spas, 500g PH Plus for increasing PH of pool & spa water, 700g PH Minus for decreasing PH of pool & spa water, 500ml Foam Remover and 25 test strips to test for total alkalinity, chlorine and PH. Chlorine.Approximate dimensions: 14cm (Depth), 20.5cm (Width), 16.5cm (Height).