WaterFilter : Add info how to recover a water filter a bit.
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help/life/filter/WaterFilter.md
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help/life/filter/WaterFilter.md
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# Water filter info.
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## How to recover Ion-exchange filter.
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Those filters are common i.e. in air humidifiers.
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To regen it a bit, put it into a solution of 1.5 liters of water and 300 grams of salt. Keep it submerged for 30 minutes, then wash with clean water.
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