Can we swim tonight with FC at only 2.2 and CYA at 70?

johnnierotten

Active member
May 5, 2020
31
Ga
Can we swim tonight with FC at only 2.2 and CYA is at 70, and then run the SWG a few extra hours the next few nights? I got busy and haven’t checked since the weekend and missed running the SWG a few nights. Water is clear, just some tree debris to vacuum up first.
 

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Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
4,585
NW Ohio
Nope. Not only is it below the minimum per the FC/CYA Chart, but swimming will lower the FC even more and greatly increase the likelihood of an algae outbreak. Also the SWG is not designed to raise the FC, it's designed to maintain it. No matter how you parse it you need to manually dose some chlorine. Just add 2-3 ppm and allow it to circulate for at least 15 minutes and you'll be fine to jump in.
 
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johnnierotten

Active member
May 5, 2020
31
Ga
Nope. Not only is it below the minimum per the FC/CYA Chart, but swimming will lower the FC even more and greatly increase the likelihood of an algae outbreak.

Just add some chlorine and let it circulate for a little while before jumping in.
Do we need to wait two hours before going in? Or how long? I have granular liquid chlorine I can add.
 

Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
4,585
NW Ohio
Oh that stuff, I thought they wised up and stopped selling it like that.

By their marketing everything is "instantly liquid chlorine" because once the chlorine hits the water it is a liquid. It's a bit of a ripoff too. They sell this stuff for $5.75/lb and then sell the exact same thing in 1 pound bags for $5.00/lb.

Oh, I see they have "instant liquid acid" too 🙄
 

johnnierotten

Active member
May 5, 2020
31
Ga
What marketing -----

It is 73% calcium hypochlorite. Nothing liquid about it.

Use PoolMath
I think I am okay on how much to add to get it up since we did that in the beginning of the season before setting up the SWG, but I’m not sure if we can still swim in about 15 minutes versus like 2-3 hrs. I’ve added it and circulating with brush now. I guess I can test the water again at this point?
 

johnnierotten

Active member
May 5, 2020
31
Ga
Oh that stuff, I thought they wised up and stopped selling it like that.

By their marketing everything is "instantly liquid chlorine" because once the chlorine hits the water it is a liquid. It's a bit of a ripoff too. They sell this stuff for $5.75/lb and then sell the exact same thing in 1 pound bags for $5.00/lb.

Oh, I see they have "instant liquid acid" too 🙄
Yes, we just bought it in the beginning until we got the pump set up and I was doing it myself and didn’t want to have liquid shipped and possibly spill everywhere making a mess. So this is just the leftovers :/