DPD No 4 tablets for testing active oxygen / total chlorine levels in pools and hot tubs using comparator pool test kits. Suitable for use in all of our comparator test kits as well as in most other makes.
Testing Range:
Active oxygen - 0 - 15mg/l (0-15ppm)
Total chlorine - 0 - 5mg/l (0-5ppm)
Pack size : 100 tablets
