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TDS (Total dissolved solids)
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520x Phenol Red photometer reagent tablets
Range: 0 - 8
Calcium Chloride (Hardness increase) Size:25kg TDS (Total dissolved solids)Calcium Chloride Flake >74%. Increases the hardness of water. Hardness, along with pH, alkalinity and temperature are required to be balanced in order to prevent corrosion or scale formation. Dosage: 14g per 1000 litres of water for a hardness increase of 10mg litre. This product generates heat when added to water so dont try and premix it in a bucket of water, instead tip the required amount straight into the pool with the filter pump running.
