Going through Chlorine like crazy

IceShadow

Gold Supporter
Jun 8, 2019
1,070
Milwaukee, WI
OK - that should put you at about 40 CYA. A little higher than suggested but still do-able. Try to maintain 16 FC - when you test, use Poolmath to figure out how much liquid chlorine you have to add to reach 16 FC and add that much. It should be going down with time. If it doesn't let us know!

Since your pool was clear you probably won't need to keep the SLAM levels up for very long. When you can, test about 15-20 minutes after your last addition of chlorine for the night and then test again in the morning, the first after sunset and second after sunrise. See if the FC stays at the same level or not.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
22,397
Laughlin, NV
Wow. Not sure what manufacturer would tell you to just dump it in the pool.

Add the CYA by using what we call the sock method. Get an old sock (no holes) and put the measured amount of CYA you need. Tie the sock closed and either suspend it in front of a return (hang it from your brush pole works with something weighted on the deck) OR if it still allows flow thru the skimmer, place the sock in the skimmer. Every 15/20 minutes give the sock a squeeze to speed up the process. Please DO NOT follow the directions on the container of CYA to just pour it into the skimmer and don't just toss the sock in the pool as the CYA is acidic and can bleach/stain pool finishes.
 
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IceShadow

Gold Supporter
Jun 8, 2019
1,070
Milwaukee, WI
Did you vacuum while filter was set to waste or to filter? If waste we won’t know how much is dissolved until a day or two passes and you can test it. If to filter, it’ll be in your filter which is fine. Just don’t backwash for a few days or it can go away.
 

Bucky63

Gold Supporter
May 19, 2018
31
Mahomet, IL
Did you vacuum while filter was set to waste or to filter? If waste we won’t know how much is dissolved until a day or two passes and you can test it. If to filter, it’ll be in your filter which is fine. Just don’t backwash for a few days or it can go away.
I vacuumed while set to filter
 

IceShadow

Gold Supporter
Jun 8, 2019
1,070
Milwaukee, WI
Ok, then you can still assume that you have 40 CYA and can go ahead and add liquid chlorine to get to 16 ppm. :) Then test often, anywhere from 3 times or so daily up to once per hour, and add chlorine again to get back to 16. You want to do this until the water is clear with no visible algae, CC tests under 1ppm, and you don’t lose any overnight (same results of FC after sundown and a second test in the morning before sun is on the pool). Then let the chlorine lower naturally. Start testing once a day at that point and just adding of below 9, enough to get to 9.

Let us know how it goes!
 

Bucky63

Gold Supporter
May 19, 2018
31
Mahomet, IL
Ok, then you can still assume that you have 40 CYA and can go ahead and add liquid chlorine to get to 16 ppm. :) Then test often, anywhere from 3 times or so daily up to once per hour, and add chlorine again to get back to 16. You want to do this until the water is clear with no visible algae, CC tests under 1ppm, and you don’t lose any overnight (same results of FC after sundown and a second test in the morning before sun is on the pool). Then let the chlorine lower naturally. Start testing once a day at that point and just adding of below 9, enough to get to 9.

Let us know how it goes!
Thanks for all your help!
 

PoolGate

Gold Supporter
TFP Guide
Jun 7, 2017
3,755
Damascus, MD
What about the ammonia reading? Is your chlorine holding now? Did you try to repeat the ammonia test from another location? If you have ammonia, you'll need to add chlorine until the ammonia is all gone. It could take quite a bit of chlorine. I did my neighbors pool with ammonia and it took 45 gallons of 8.25% bleach.