Hunt around. LC is going for as low as $13/5 gallons for 12.5% That's like $1.30/gallon of 6%--a VERY low price.
Cal hypo CAN cause milky water. You can't really use the easy cure of adding some muriatic acid because your pH is 7.2. You COULD raise your pH to 7.8 with, or better, with aeration, then lower it with muriatic acid to clear the hazing. I don't know if that would work, but if the hazing is due to calcium, it might.
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