Tests for Sodium Chloride with advanced precision. AquaChek White is a unique teststrip that simplifies an otherwise complicated testing operation. Unlike other test kits, the AquaChek White strips will give you a specific reading of the salt level in your water. A proper level of salt will ensure that the generator is able to produce the desired amount of chlorine and keep the water free of contaminants. Comes with complete instructions. Test range 400-7,000ppm (mg/L) - 10 strips per bottle. The test takes just 3 to 4 mins using a small water sample.