Perfect for checking the water quality of Hot Tubs, Swimming Pools, Ponds and Spas.Easy-to-use colour match system, simply dip the water quality testing strip fully into the water, remove and hold horizontally then read against the coloured chart on the side of the bottle in 30 seconds.Can be used for both inflatable Hot Tubs & PoolsSupplied in a pack of 50 which should allow you to test the water multiple times a week through the summer season.Model No. DL32PERFECT FOR MAINTAINING WATER QUALITY - Ideal for checking the water quality of Hot Tubs, Swimming Pools, Ponds and Spas.EASY COLOUR MATCH SYSTEM - Dip the water quality testing strip fully into the water, remove and hold horizontally then read against the coloured chart on the side of the bottle in 30 seconds.SUITABLE FOR - Can be used for both inflatable Hot Tubs & PoolsLONG-LASTING PACK - Supplied in a pack of 50 which should allow you to test the water multiple times a week through the summer season.