BioLab 6-in-1 Water Test kit – Refill items – DPD No. 1 Test Tablets (Pkt 50 tablets)
DPD No. 1 Test Tablets for “Free Chlorine”
Used to measure “free” or “available” chlorine which is the chlorine available in the water to sanitise the water and protect swimmers.
Requires the use of a Test Kit such as the Biolab 6-in-1 Water Test Kit.
Price includes “Free Postage” anywhere in Australia.