Comments for No Total Or Free Chlorine And Pool Can't Hold Cyanuric Acid (CYA)

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Jun 02, 2017
chlorine problems
by: Anonymous

Could not get my cholrine to show up on test strips or liquid tester. All other chemicals were fine.

Finally the pool store tested for phosphorus. Was high . after treatment it now tests fine.

Looked on many sites never saw this as a problem.
Hope that helps . I was going crazy.

Jul 27, 2015
No CYA or Chlorine Even Tho I Keep Adding
by: Macs

I have IG 33,000 gal. In the last 2 weeks I have added 29 lbs of stabilizer and it still registers none. I have added 24 gal of chlorine, registers no FC or TC. Pool store gets same reading. I'm putting chlorine in every night, morning it registers none. Filter and Auto chlorinated is going 24 hours. Pool was cloudy before I added the CYA. Now clear, occasional algae growth but keeping it under control with algaecide and vacuum. . Pool temp is 86.
Not sure what to do

Thanks for the question. With a starting point of 0ppm CYA and a 33k gallon pool, by adding 29 lbs. of CYA you're reading should be about 100ppm. The range is 30 - 50ppm. You use about 1 lb. of granular CYA to increase 10ppm per 10k gallons. In your case you'd use almost 3 lbs to increase 10ppm.

I'd first ask if you're actually using granular CYA? It can take up to a week for it to totally dissolve. Next is the kind of test kit you're using. Are you using strips? And what kind is the pool store using? You need to get the Taylor K-2006 kit.

If you've verified that it was granular CYA and you did have a starting point of 0ppm and did add 29 lbs. you're probably going to need to do a partial drain and refill to get it to 30ppm. With a very high CYA reading your FC is being rendered ineffective. Again, the CYA range is 30 - 50ppm and the FC is 2 - 4ppm within the FC/CYA relationship.

If you feel your situation is more complex than this, I do phone and/or SKYPE consultations. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias. If you purchase a personal phone consult you'll get all 3 eBooks for free.

Pool Consultation

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Jan 16, 2015
CYA wont get above 35
by: Kirsten

I'm a new pool owner and doing pretty good I guess. My only question is why I can't seem to get my CYA above 35. Pool is 15 x 30 4' deep oval above ground, vinyl, sits in the sun 10 hours a day. My FC is 4 but the CYA is still low. I'm constantly putting bleach in the pool.

I've added stabilizer twice now, waited a full week and it barely raised it. Any ideas? Oh, and I'm using the Taylor FAS-DPD test kit, so it should be accurate.

Thanks for the question Kirsten and glad you found my site. If you have any other questions I'd encourage you to use the "Ask The Expert" or "Contact Me" button on the Navbar to the left, or go to one of the many pages I have invitations on.

You can ask your question there and hit submit. It will take you another page to ask if you want to know when a reply is made. Simply put your email address in the box and hit send. Your email is safe and no one who visits the site will see it. Doing this will create a page specifically for your question and you can refer back to it whenever you want.

I also make follow up comments on the page so there's no need to flip back and forth from one page to the next.

Your CYA is the stabilizer for the pool, as you know. For home pools it should be between 30 - 50ppm. The easiest way to increase your CYA is to use Dichlor. This is a stabilized form of chlorine. Be careful when using this because your CYA can get out of hand quickly.

For every 10ppm of chlorine added with Dichlor, you'll raise the CYA 9ppm. You can also use Trichlor tabs for weekly chlorine maintenance, with manually dosing your pool with either bleach or chlorine.

Trichlor will slowly increase the CYA as well. For every 10ppm of added chlorine with Trichlor, your CYA will be raised 6ppm. Bleach is unstabilized and will not raise the CYA, but is the same as regular pool chlorine.

It's just about 1/2 the strength. If I were you I'd keep the CYA where it is. There's really no need to raise it. Once it is raised, the chlorine must be raised as well in proportion to the CYA. The chlorine should be 7.5% of your CYA level and that's 30 - 50ppm. Your chlorine is 4ppm which is fine. If the CYA get too high the only way to reduce it is a partial drain and refill.

Hope this helps and have a fun and safe Summer.

Let me know when you get this reply.


Jan 16, 2015
No Chlorine Problem Solved
by: Gary

I finally solved the "no chlorine" problem. I drained a little over half of the water and refilled. Then brought the CYA to target, balanced and added salt for the SWG but didn't turn it on. Testing showed zero chlorine.

I then shocked heavy 2x per day early morning and after sunset raising chlorine to around 20ppm each time. Day 1 chlorine totally disappears in 2 hrs. Day 2 held for about 4 hours. Morning of day 3 held about 6, and evening held all night and next day. I left the SWG off but it still took 3 days to fall back to 4ppm.

The water is balanced and never looked better, and is holding Chlorine so well I have to the SWG off for a day or more at a time to stay below 3ppm. Even with it set at 20%. Thanks for the help!


Congratulations on your perfectly balanced pool. And the Summer is still young so go enjoy it. That's what it's all about.

Jan 16, 2015
No Free Or Total Chlorine In The Pool
by: Gary

Robert, thanks for your comments -- much appreciated! I do shock my pool at night and have raised it to about 20ppm chlorine the last two nights only to have a 0 reading within a few hours. I have no chlorine remaining, total or fee, by morning.

Also, I do have a Taylor FAS-DPD Pool Water Test Kit K-2006 on order but I've been using test strips or reagents at home with an occasional test at our local pool store until it closed 3-4 years ago. Your comments about anerobic bacteria are quite helpful.

I'm starting to think that this problem has been building for several years and just hit the flash point last summer when the pool hit a new high temperature. And ammonia produced by the bacteria may also explain why I've had trouble keeping CYA within range. None of my previous home testing provided "Total and Free" Chlorine, just "Chlorine."

And since the water in my pool has been crystal clear and easy to balance, and the Aqua Rite generator has consistently maintained chlorine I didn't think it necessary to shock the pool on a regular basis or drive to another town to have the water tested.

But thinking back, I have had a growing algae problem which may have been an indicator that CC was climbing and FC declining. I now also remember having a similar chlorine problem about 7-8 years ago which I blamed erroneously on the chlorine generator.

At about the same time we lost our liner to a hurricane and once it was replaced and the pool filled with fresh water the chlorine problem went away. So this is a long winded way of saying, I'm draining the pool and I will pay much more attention to CC and FC in the future.

Thanks again!

You were very helpful.

Long winded is always good. It gives people the answers they need. Thanks and have fun with your pool.

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