Sometimes too much chlorine gets into the pool - often by accidentally overdosing with chlorine or after shock dosing to get rid of algae. It is not recommended to swim in water with more than 3 parts per million chlorine. Chlorine remover (sodium thiosulphate) will remove that chlorine so you can swim straight away. Be careful not to overdose chlorine remover or you will have to add lots of chlorine to remove the chlorine remover. That is good for chemical suppliers profits but not for your pocket....

First carefully test the pool water to get an accurate chlorine level (see testing for high levels of chlorine). Work out how much you need from the chart below :

Amount of dechlorinator required to dechlorinate various volumes of pool water in grams:

Pool Volume			Chlorine Reading parts per million
Cubic meters	Gallons		1	2	4	5	10	20
227	50,000		550	1100	2200	2750	5500	11000
182	40,000		450	900	1800	2250	4500	9000
137	30,000		350	700	1400	1750	3500	7000
91	20,000		225	450	900	1125	2250	4500
45	10,000		110	225	450	560	1125	2250
23	5,000		55	110	225	280	560	1125
9	2,000		25	45	90	115	225	450
4.5	1,000		15	25	45	60	115	225

To use dissolve correct amount of dechlorinator from above table in a plastic bucket of warm water. Distribute evenly through the water. Allow pool water to turn over twice before further analysis.

CAUTION: Underdose rather then overdose