Chlorine bleach based disinfectant tablets.? More convenient and safer to use than traditional liquid hypochlorite bleach.? One or two tablets in a bucket of water dissolves with an effervescent action to give a solution of ready to use bleach.? The active constituent is dichloroiscyanurate.? Each tablet yields 200 ppm of available chlorine when placed in 5 litres of cold water.??Can be used against HIV (Aids) and the hepatitis B virus.?