High Quality Blue Horizons Raegents for water-analysis testing using colour compare test kits. These tablets are produced by Lovibond so are high quality. 50 tablets in 5 packs of 10 sealed packets. DPD No 1 is used to test Free Chlorine in water.
These are not compatible with photometers. They are for manual visual test kits. Click here for photometer grade tablets
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