I'm the new owner of a used hot tub. Filled it up yesterday, and today put in the bottle of pH proper that was recommended to me. Not realizing how hard my water was, the water immediately turned milky white cloudy, and I'm not sure where to go from here. Do I let the filter run and hope that it will filter out the cloudiness? Do I try to clarify or shock the water? OR do I have to dump it and start again? Any help is appreciated!!!!!

have you resolved your issue? Many times it's just a matter of waiting a couple hours for the filter to do it's job... Be a good idea to remove and clean the filter after the fact.