Hello. We switched our pool to a Nature Two cartridge system and potassium shock due to chlorine triggering asthma attacks in a family member. The pool water looked good for about the first month. Now it is starting to be slightly cloudy-as in not "crystal clear and sparkling". I've been reading some posts on potassium shock but some of the abbreviations are above my head. The pH is ok, but alkaline is a little high. I used a 3 month algicide. Would someone please give suggestions on pool maintenece with the Nature Two and use of potassium shock? I'm also not sure how to reduce the alkaline without lowering the pH too much. Help??