Can't get FC up

[ogtriple]

I am having issues getting my FC to even nudge above 1ppm right now for the last 3 weeks. I have a 20k gallon salt pool, in South Florida (90-100 degrees all day), pool gets almost full direct sun daily, swg is a circupool core55 I bought in May of 2022. I just cleaned the titanium 2 weeks ago, very little calcium buildup on it and it came clean with 20 minutes of muriatic acid. Checked my numbers twice today with a Taylor kit.

FC - Less than .5
PH - 7.2
Alkalinity - 70
Calcium Hardness - 450
CYA - 50

SWG is at 100% output, Pentair SuperFlo is currently running 18 hours a day, 12hrs at 2000rpm, 6 hours at 3450rpm.

 

[PoolStored]

SWCG is not good at raising FC. Raise the FC with liquid chlorine and use the SWCG to maintain it.

If you cleaned with muriatic acid, for an extended amount of time, you may have removed a significant amount of the rare earth metals used in the cell to make chlorine. We don't recommend cleaning with muriatic acid. Leads to a shortened life.

Read how to clean here...

SWG How It Works - Further Reading

www.troublefreepool.com

 

[an1vrsy]

For three weeks you’ve been below the minimum FC for your CYA level. Go ahead and perform the OCLT. If you don’t pass then you will have SLAM.

If you do pass the OCLT, then follow through with PoolStored advice.

 

[ogtriple]

For three weeks you’ve been below the minimum FC for your CYA level. Go ahead and perform the OCLT. If you don’t pass then you will have SLAM.

If you do pass the OCLT, then follow through with PoolStored advice.

What is OCLT?

Edit.. I just found out, going to do the test tonight.

 

[pjt]

I just cleaned the titanium 2 weeks ago, very little calcium buildup on it and it came clean with 20 minutes of muriatic acid.

Unfortunately, that may have significantly shortened the lifespan of your cell. If you maintain a slightly negative CSI, you'll likely never have to clean the cell for its entire service life. If you do need to clean it:

SWG How It Works - Further Reading

www.troublefreepool.com

 

[Newdude]

just found out, going to do the test tonight.

Besides the now possible algae, 50 CYA wasn't cutting it for my SWG in NY a month or two ago. UV spiked early for many of us this year.

In southern FL, some need 90 CYA in the peak season. Once you prove there's no algae, or SLAM and then prove the algae is fully ridden, we'll raise the CYA and road test it for every +10 until the FC holds and the SWG can keep up.

 

[ogtriple]

Unfortunately, that may have significantly shortened the lifespan of your cell. If you maintain a slightly negative CSI, you'll likely never have to clean the cell for its entire service life. If you do need to clean it:

SWG How It Works - Further Reading

www.troublefreepool.com

It's literally written in every owners manual to clean with 3 parts water 1 part muriatic acid.

 

[ogtriple]

Besides the now possible algae, 50 CYA wasn't cutting it for my SWG in NY a month or two ago. UV spiked early for many of us this year.

In southern FL, some need 90 CYA in the peak season. Once you prove there's no algae, or SLAM and then prove the algae is fully ridden, we'll raise the CYA and road test it for every +10 until the FC holds and the SWG can keep up.

Yeah I'm learning the hard way lol. I started my slam about 45 minutes ago. FC is at 28 and CYA is at 70. I'm probably going to add another 2lbs of CYA and get it up to 90.

 

[PoolStored]

It's literally written in every owners manual to clean with 3 parts water 1 part muriatic acid.

Which leads to rare earth metal degradation, which leads to early cell failure, which leads to additional sales. Rinse and repeat...

 

[Badpoolmom]

Once you prove there's no algae, or SLAM and then prove the algae is fully ridden, we'll raise the CYA

I think newdude is advising raising cya AFTER you pass SLAM

Higher cya= more liquid chlorine to reach (target or slam) fc levels

 

[pjt]

It's literally written in every owners manual to clean with 3 parts water 1 part muriatic acid.

That's bad advice and should be disregarded. I understand your frustration.

 

[Newdude]

It's literally written in every owners manual to clean with 3 parts water 1 part muriatic acid.

It's literally written on my cell itself. Not 'inspect and clean if needed' mind you..... 'acid clean every 3 mos'.

I have no calcium and won't ever scale the cell. But what do they care about logic or chemistry ? Your choice if they are simply ignorant or nefarious.