Whether you're topping up a hot tub or maintaining a pool, use this guide to determine how much chlorine to add to increase the level by 1 ppm (parts per million).

Litres	To Increase Chlorine by 1ppm
600	1.2g
800	1.6g
1000	2g
1200	2.4g
5000	20g
10000	40g
15000	60g

Need to know how much chlorine you need for a booster shock dose? See our "Shock" Dosage Guide"