Just looking at your numbers again. Did the pool store sell you alkalinity increaser OR calcium hardness increaser for your pool?

If they did, they CREATED this problem.

If they did not, and if you haven't used calcium hypochlorite shock, the water you filled with is probably hard.

But with a TA of 250 and a CH of 330, you definitely could be having some problems with calcium cloudiness. It would be a good idea to wash off your cartridge before you add acid, since you may have already filtered some calcium carbonate. The acid could dissolve it, and put it back into your pool.