if it's over .5 I'd be a little worried. You can do the overnight FC test and determine if you need to shock. If your CC is up there, that would explain why you have the bleach smell. It's possible if your FC was 0.
How long to get FC up?
- Thread starter Hurricane Gio
- Start date
I switched from a Clorox pool (for only a couple of months) to a SWCG. I did not smell chlorine when using Clorox and I do not smell chlorine with the SWCG.
Phosphates and SWG
I have had some issues with my SWG and getting my FC up. I called the PB today about having the cell checked on my its not producing chlorine. They said before someone comes out Tuesday, to check my Phosphates levels. They said this could be eating up the Chlorine and making it hard for the cell to keep up. I know many here say phosphates are overblown. But they insist its a issue with SWG only.
Yesterday I add enough bleach to get to 5.0 by the pool calculator. Today its down to 2.5. CYA is at 70 and I have 0 CC.
I have had some issues with my SWG and getting my FC up. I called the PB today about having the cell checked on my its not producing chlorine. They said before someone comes out Tuesday, to check my Phosphates levels. They said this could be eating up the Chlorine and making it hard for the cell to keep up. I know many here say phosphates are overblown. But they insist its a issue with SWG only.
Yesterday I add enough bleach to get to 5.0 by the pool calculator. Today its down to 2.5. CYA is at 70 and I have 0 CC.
Re: Phosphates and SWG
phosphates don't eat clorine- but maybe interfere with the electrolytic cell?
phosphates don't eat clorine- but maybe interfere with the electrolytic cell?
Re: Phosphates and SWG
Phosphates have nothing to do with it, aside for making the people who sell them money.
You might have a low level algae problem. With a SWG you can have algae and clear water. You should do an overnight FC loss test with the SWG off.
Another possibility is something wrong with the cell, though that is less likely.
You should also post a full set of water test results.
Phosphates have nothing to do with it, aside for making the people who sell them money.
You might have a low level algae problem. With a SWG you can have algae and clear water. You should do an overnight FC loss test with the SWG off.
Another possibility is something wrong with the cell, though that is less likely.
You should also post a full set of water test results.
Thanks. I will post numbers later. Could my regents be bad after a year?JasonLion said:
The test reagents normally last several years. The need to be protected from freezing and not left in the sun too long. If stored in a cool dark place they will last a number of years.
Ok. CYA is 0!! I guess I added it wrong last week. Hence why the FC is going fast! Just bought 7 lbs to add today.
If your CYA is really zero, or near zero, that is your problem right there. CYA needs to be around 70 to 80 with a SWG. Your CYA can't actually be zero, or you would have lost all of your chlorine already, but it could be something quite low, like 10 or 15, which will read as zero on the test.
I did loose 3 or so in 14 hrs. Its hot right now and the pol gets direct sun almost all day. I am bringing the CYA up to 80 per you and the PB recommendation with the Aqualine.JasonLion said:
So my target FC should be 6 per TFP water FC/CYS chart. Correct?
No, that is a more complex issue. The smell is CC, which forms when the FC level is too low. Your FC level has been to low recently, so you got some CC, which then outgases over a period of time. Once the FC level is stable at an appropriate level, CC will stop forming and the smell will go away.
JasonLion said:
Thanks. But I tested for CC and it was Zero.
Thanks for everything.
In particular, when you don't have any CYA in the water, then the active chlorine level is much higher and will tend to produce orders-of-magnitude nitrogen trichloride which is very smelly -- the odor threshold is 0.02 ppm (20 ppb) which is well below what can be tested in the CC test.