Cloudy water. Need some advice.

[Charlie227]

Two weeks ago when I started the TFP journey, I was running a high FC in the 7-9 range. Water was nice and clear. A few days ago I reduced my SWG % from 50-60 % down to 25 and 30%. At noon today, my FC was at 3 and the water is showing a cloudy haze. It’s not bad but it doesn’t have that sparkle. UV has been extreme here in Florida. I assume the low SWG setting is the culprit but I don’t know for sure. I increased the output to 60% so I can get back to an FC of 6.

These are my numbers at noon today. SWG had only been running 2 hours before the test. I normally run for 8 hours/day. I don’t feel I have a good grasp on setting the SWG for consistency yet. The only chemicals I’ve added was about 16 oz of Muriatic Acid last Tuesday to lower the pH to 7.4. It has come back up some.

FC 3
CC 0
pH 7.6
TA 80
CYA 85
Salt 3487
Water Temp 85
CSI -.025

What would you do to clear up the water in my SWG pool? Thank you.

 

[justinc]

Are you losing chlorine overnight when no UV light is present? Have you performed an overnight free chlorine loss test? Perform the Overnight FC Loss Test (OCLT) - Trouble Free Pool

This will tell you if you have organics growing in the water and need to SLAM.

Your pump and filter are working well? No circulation issues?

 

[Shapmaui]

I am sure you will get the answer you are looking for in this forum. My initial thought is your FC is too low for the amount of CYA you are reading.
Please take a look at the FC/CYA chart here-

The Free Chlorine and Cyanuric Acid Relationship

Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.

www.troublefreepool.com

 

[Charlie227]

Are you losing chlorine overnight when no UV light is present? Have you performed an overnight free chlorine loss test? Perform the Overnight FC Loss Test (OCLT) - Trouble Free Pool

This will tell you if you have organics growing in the water and need to SLAM.

Your pump and filter are working well? No circulation issues?

Will do the overnight test in a day or two. Pump and filter are good. Thanks.

 

[Charlie227]

I am sure you will get the answer you are looking for in this forum. My initial thought is your FC is too low for the amount of CYA you are reading.
Please take a look at the FC/CYA chart here-

The Free Chlorine and Cyanuric Acid Relationship

Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.

www.troublefreepool.com

Yes, I agree with the low FC.

 

[mknauss]

With your level of CYA, in your climate, I would run the FC between 7-9 ppm.

 

[Charlie227]

Update:

After my previous test, I bumped the SWG to 60%. After 6 hours, I was back up to FC 4 even with all the brilliant sunshine. The pH went down to 7.4. I had 3 folks in the pool most of the afternoon. I am going to run the pump all night and set SWG at 50% and see where I am in the morning.

 

[Charlie227]

With your level of CYA, in your climate, I would run the FC between 7-9 ppm.

Thanks Marty. I agree.

 

[Charlie227]

Update - Ran pool pump all night. SWG set at 50%. Water is beautiful and crystal clear this morning. Will leave it set and do a full water test this evening.

FC 6
PH 7.8
Salt 3493
Water Temp 81

 

[Charlie227]

I did the OCLT this morning. Last night the FC was 6 and this morning it is 5.5. Looks like that is ok and my previous cloudy water was the result of letting my FC get too low (3) considering my CYA level.

Thanks for all your good advice. Much appreciated.