Pool was clean and clear. All the numbers were on target. After all the rain we had the PH was 6.8. I had PH plus. Right after I added the PH the water got cloud so bad I couldn’t see 3 ft deep. It happened in 3 minutes. The only think I’m using different this year is cal hyp. My number on PH now is 7.2. Like I said numbers are spot on. I took the two filters out and they were bad. All yellow pollen. I was shock to see this before I just cleaned them last week.