10.3.2  Aquatabs

Aquatabs is the brand name of a solid form of sodium dichloroisocyanurate (NaDCC), a disinfectant. The tablets (Figure 10.11), which have to be imported, are easier than bleach to store, handle and transport. One tablet contains 67 mg of NaDCC and can treat 20 litres of clear water. The tablet has to be dissolved in the water by vigorous mixing, and a contact time of 30 minutes is necessary. If the water is turbid, two tablets will be needed.

Figure 10.11  Aquatabs tablets for household water treatment.

10.3.1  Bishan Gari Water Purifier

10.3.3  P&G Purifier of water