Cloudy after SLAM

[hesterific]

Hi pool experts! I used cal-hypo to slam because that's what I had on hand and I definitely made a big mistake - my beautiful pool is now cloudy after running the sand filter for 12 hours. Did I destroy my pool? I decided to SLAM after my pool wouldn't hold chlorine after 48 hours of "super coordinate" and then adding 4+ cups of liquid chlorine a couple days later. I then added 2lb of cal-hypo shock and it dropped to 0 after 18 hours. I am adding chlorine at night. I'm just south of Boston and weather has been a mix of cold (45°) and warm (80°) but mostly 60° or so.

Taylor test kit k-2006

Before SLAM:
FC 0
TA 120
CYA 60
pH 7.4
CH 250
SALT 3200

After SLAM FC is 25ppm

SWG
Vinyl liner
15500 gal
Taylor test kit k-2006

 

[JJ_Tex]

Keep it at SLAM levels until you pass all 3 criteria. Cal Hypo can cause cloudiness, but it should dissipate soon.

 

[gingrbredman]

You mention something about after SLAM, but the process requires you to clear all three criteria before being completed, the third being.....

AND pool water is crystal clear

As @JJ_Tex points out, you need to keep it in SLAM until you clear all three.

SLAM - Shock Level and Maintain

We’ve all had to deal with a green pool. Clear algae from your pool with a SLAM! Read here to use shock level and maintain to clear your pool.

www.troublefreepool.com

 

[Mdragger88]

What they said
The slam process is not a one & done addition of chlorine.
This means testing & replenishing the fc to slam level for your cya multiple times per day not just at night. The more often the better & the faster you will achieve all 3 end of slam criteria.
Stick with liquid chlorine for the slam.
Cal hypo can cause cloudiness as you have experienced & also adds ch, you really don’t need any more calcium in your pool.

For a successful SLAM Process
you need to continue to MAINTAIN Slam level fc for your cya as often as possible (multiple times per day is best) until you meet ALL 3 end of slam criteria-

You are done when:

CC is 0.5 or lower;
You pass an Overnight Chlorine Loss Test
AND
the water is clear.
(Crystal Clear w/no algae dead or alive)

*Check & scrub every nook & cranny where algae may hide (light niches, steps, drain covers, ladder handrails, skimmer throats/weirs, abandoned lines, autofill, overflow drains, etc.)
*If water can go there, algae can thrive there.
*Run slam level water through all water features & lines for at least a couple hours a day during the SLAM Process.
*Brush & or vac daily (this breaks up biofilms that algae uses to protect itself from chlorine)
*Backwash/clean filter when pressure rises 25%over clean pressure.