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My IO salt tests out to have a dkh of 11-16dkh with every batch but it really doesn't concern me as the tank I change the water on is a 180 gallon so it would make a very minimal increase to my overall dkh which is usually in the 8-10 dkh range anyway. Calcium is always low in the salt mix at 370 or so too. Could be better.
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Freed
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