Free Chlorine Trouble

[holyedge]

New to site and frustrated with my pool. Troubleshooting for 3 days now.
My metrics are as follows:
Vinyl inground pool with 22k gallons. Jandy pump with cleaning system and inline chlorinator
Free chlorine was zero over weekend and I had pink algae surface in skimmers but nowhere else in pool. I shocked twice and was able to keep FC at 3-5 ppm for over 32 hrs. All other levels right on target. Treated with pink algaecide. No sign of it since. Pool is super clear. I took reading this morning and everything was perfect. I only added some calcium to raise by 50 ppm. 12 hrs later and everything is good except FC is zero and TC is also zero. I havent backwashed at all. Other readings are TC = 0, alk = 100, ph = 7.6, CH = 100, CYA = 50-60. Any help is appreciated.

 

[duraleigh]

You are either not adding enough chlorine to your pool to keep it in there during the day or you have an algae bloom or both.

I would add enough chlorine to get to somewhere around 10 ppm tonight, shut of all other sources of chlorine and perform the OCLT. Pool School teaches you how and we will help.

 

[JasonLion]

Whatever you are calling "shocking" isn't the correct procedure. [shock:etenxr3x]You need to SLAM your pool.[/shock:etenxr3x]

 

[JohnN]

What kind of test kit do you have? To properly SLAM the pool, you will need the TF-100 or K-2006, which are linked to in my signature.