Quote:
Originally Posted by Wormius
Some kind of filter material?
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Thanks Wormius, I think you're right, its the resin from the water softening unit. When you add the salt (sodium) it recharges the resin letting the hardness (calcium and magnesium) get adsorbed and the sodium replaces the hardness in the water.
How the hell did I not think of this (part of my job, softening water for a chemical EOR flood)!!!