Calcium Hypochlorite 68-70% strength
Pool (Regular Dose): 2 grams per 1 m3 of pool water after pH requlation every night. To increase the free chlorine level by 0,5 ppm add 100 grams per 100 m3. If algae is present you may need to double or even treble the recommended dose.
Pool (Shock Dose) : 10 grams per 1 m3 (1 kg per 100 m3) pool water after pH requlation.
Drinking Water : 5 grams (a teaspoon) increases the chlorine level by 2,5 ppm in a 1,000 litre spa.