| SYMPTOM |
PROBABLE CAUSE |
UNDERLYING REASON |
TO RECTIFY |
| pH locked in/difficult to adjust |
Alkalinity to high |
Bicarbonate levels in pool too high |
Check pH and reduce alkalinity to recommended level |
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or |
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Topping up from mains water can incrase alkalinity in hard water areas |
Check mains water alkalinity level. Is it higher than 150mg/l? If so, reduce |
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or |
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Carbon dioxide used and increased alkalinity beyond desired level |
Aim for 7.6 pH to minimise Carbon dioxide dosing level |
