Hardness of ion-exchanged water
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It was the first time that water hardness was tested recently, but during the measurement it was found that the hardness of water that has been treated with ion exchange resin is higher than that of the water in the cooling circulation tank What’s going on here (no substances have been added to the water in the cooling tank)?
Has the resin failed? What you’re doing now is essentially flushing the resin, which increases the hardness of the water