🧪 Tap Water Testing Before New Pool is Filled

[violet-mermaid]

It looks like I lost quite a bit of chlorine, it was at 5 yesterday morning. Will do the overnight test.

Ph: 7.8
Cl: 0
CYA: 35
TA: 90

 

[Rancho Cost-a-Lotta]

Uh oh. Raise FC to target level and do an Overnight Chlorine Loss Test test tonight.

Have you been adding liquid chlorine each day to target level?

 

[violet-mermaid]

Pic of pool water

 

[violet-mermaid]

Will do! Yes, I'm adding liquid chlorine as needed, almost every day.

 

[violet-mermaid]

I’m unable to view the overnight chlorine test article on both desktop and mobile…

 

[Rancho Cost-a-Lotta]

Here is the text from the article:

To perform the overnight FC loss test:

1. If you have an SWG, tablet chlorinator, or other chlorine feeder, shut it off completely.
2. After the sun goes down, and at least 30 minutes after your last chemical addition of the day, test your water for FC using the FAS-DPD test making sure your FC level is at least above 3ppm.
3. Record that result. Do not put any more chlorine in your pool.
4. If the OCLT is in conjunction with a SLAM, the pump should already be running 24/7. If performing the OCLT independently as a diagnostic test, it is vital the pump be running at least 30 minutes before the grabbing the nighttime and morning water samples for testing in order to ensure the water is properly mixed.
5. The next morning, as early as practical and definitely before there is any direct sunlight on the pool, perform the FAS-DPD FC test again and record the results.

If your FC level remained the same, or went down by 1.0 or less, the water is clean. There isn’t any living algae or other organic contamination in the pool.

If you lost more than 1.0 ppm of FC, then there is something in the water that needs to be removed and you should SLAM, or continue SLAMing, the pool.

 

[violet-mermaid]

Got it, thanks!