Don't think it would be calcium precipitating unless your dosing cal/alk,etc. - precipitation is usually due to an excess of calcium and lack of magnesium but your salt should be balanced.
I dose vinegar and the bacteria is noticeable in mats that collect close to the dosing inlet and in my reactor. All in very stringy mats but nothing in the water column that shows as cloudiness. Dosing vinegar and Kalk will definitely help the alk and ph issue and might help to get the bacteria in your sump instead of the water column ( if that's what the haze is).
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