High CYA and salt not decreasing

[wgmamc11]

Hi All,

I have elevated CYA but no algae problems right now. I think I overdosed it (rookie mistake) when it was too low. Should I worry about this if algae doesn't start? Or just maintain correct FC per the chart and wait for summer splashout to lower it?

Also, since I moved in 3 months ago, the salt levels haven't dropped at all. The SWCG was running ~50% for at least 2 of those months. Measured with the controller and my test kit, similar results around 3400-3800ppm depending on the day & method. Is it normal for it to not drop noticeably for so long? I'm maintaining with liquid chlorine now that water temp is in the 50s.

Latest test: FC ~9.5, CC 0, PH 7.9, TA 90, CH 400, CYA 90, SALT 3400, Temp 54, CSI -0.09

 

[JJ_Tex]

Your numbers look good to me. Yes, your CYA is a bit high but you are properly accounting for that by keeping your FC higher. Just don't add any more and your CYA number should drift down a bit due to splash out and normal CYA degradation.

 

[wgmamc11]

Ok, cheers, thanks.

 

[Edc1911]

I live in Texas as well, and I do have to check my CYA once a month during the summer because it will drop. IIRC I had to add 2lb of CYA over the summer to keep it at 50.

 

[wgmamc11]

Thanks. Any idea why the salt may not noticeably change? JJ-Tex, How often do you normally have to add?

 

[mknauss]

The only way salt level declines in your pool is if you take water out of the pool (intentionally or due to overflow) and replace with fresh water.

 

[wgmamc11]

Hi. Pretty new to this and thought the SWCG consumed salt. Thanks for letting me know.

 

[mknauss]

SWG How It Works - Further Reading

www.troublefreepool.com

Nothing removes salt from the pool water. Several things add it, like muriatic acid, liquid chlorine, and people.

 

[JJ_Tex]

Hi. Pretty new to this and thought the SWCG consumed salt. Thanks for letting me know.

For reference I have 2 bags ready to add once the weather gets better to get me back to 3,600 ppm. I might have to add another bag later in the swim season due to splash out, backwashing, etc.

 

[mgtfp]

Hi. Pretty new to this and thought the SWCG consumed salt. Thanks for letting me know.

SWG turns salt (chloride) into chlorine. By being "used" by sanitation, oxidation or UV-breakdown, chlorine gets turned back into chloride.