CYA stays at 0

[Lrinaldo99]

Hi all! We recently had to replace our pool, so we have brand new water. Crystal clear, CC is 0. FC is 22 currently. CYA was 0, so according to PoolMath we needed to add 48oz of stabilizer (crystals). Added to the skimmer, waited a few days, still 0. We just added the rest of the stabilizer which was about 30oz and I'll pick more up tomorrow...but any ideas why the CYA is not increasing? We used the Taylor K-2006 to test.

Thanks
Liz

 

[mknauss]

The granules you trickled into the skimmer are most likely in the dead flow zone of your cartridge filter. That is why it is recommended to place the granules in a sock and hang it in front of a return jet. Squeeze it every once in a while and the granules dissolve.

I suggest tearing down your cartridge filter and seeing if the granules are in there.

 

[Donldson]

Have you popped open the filter to see if it is all sitting on the bottom of the cartridge? Your most recent test, was there any cloudiness to the dot at all?

EDIT: yeah, what he said

 

[Lrinaldo99]

They are not in the filter... we have done it this way before with no trouble. Also, we are not losing chlorine... wonder if the reagent is bad? In the test we did tonight, there was no cloudiness at all. Clear as day.

 

[jgofnj]

Why is your FC 22?

 

[Lrinaldo99]

Because we were slamming, as the water was brand new.

Why is your FC 22?

 

[Lrinaldo99]

The reagent was bad!! Now we are at 100. Darn it. We JUST had the pool filled. I really don't want to replace. Is there anything else I can do??

 

[Wasted0101]

Nope, only way to lower CYA is a partial drain and refill.

 

[pooldv]

With new water and 78oz of CYA your CYA should be 77 ppm. Even if it is 100, either because you added more than 78 oz or your water volume is lower than you thought, you can run FC at 7-9 ppm and it will be fine.

 

[Lrinaldo99]

With new water and 78oz of CYA your CYA should be 77 ppm. Even if it is 100, either because you added more than 78 oz or your water volume is lower than you thought, you can run FC at 7-9 ppm and it will be fine.

Thank you!!