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Originally Posted by TerraMex
and that level is ?
you need to test the water -> maybe a kit (like a pH kit)?
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Found this on the web - If you are disinfecting your water, enough chlorine should be added to provide a free chlorine residual of around 0.5 parts per million (0.5 milligrams per litre) after 30 minutes. As a general guide, an initial dose of 5 parts per million (5 milligrams per litre) of chlorine will provide this residual.
You can test this with a swimming pool test kit or dip strips, obtainable from your local pool shop or supplier. Any chlorine smell and taste in the water will dissipate after a short time.
Problem solved.