This is my first time on this site and I thank everyone in advance for any help. I have a fiberglass in ground pool (5th season) and can't clear up milky/cloudy water. We changed the sand in the filter last week. It looked like it was starting to clear up but now this morning it is worse then ever. This has been going on for 3 weeks now? Hardness was low since this year's opening. Dropped from 50 (already low) to 30 this past week. We added Hardness Plus this past Wednesday and it is now up over 200. Chlorine dropped from a 5 to 0 in a 24 hour period after the Hardness Plus was added. It has been in the 90º the last week.

Had water tested yesterday, pool was slightly cloudy but looking much better added soda ash as PH was 7.0 and this morning the pool is back to milky white and cloudy.

Any help would be much appreciated.