How Many 3" Chlorine Tablets Per Week

by Ed
(Kissimmee, FL)

Have an 8,000 gallon pool. My salt generator cell just went after 5+ years. In the meantime, how many 3" chlorine tablets do I use in the floater each week. I have been told from 1 to 3.





Thanks for the question Ed

What you've heard is probably right. For a smaller pool as yours, 1 - 3 tabs per week is about right.

The main thing is to watch the stabilizer (CYA). This can creep up quickly. You'll want to keep it between 30 - 50ppm. Once it gets 80ppm or above you'll want to do a partial drain and refill. Too much CYA can render the chlorine much less effective. When this happens an algae bloom and green water is next.

I hope this has answered your question to your satisfaction.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Chlorine" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of $35 per hour and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.









Hope this helps.

Robert

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Pool Chlorine Tablets.

8ft Easy Up Pool - Chlorine Tablets?


(Sue)

I have just bought a 8ft easy up Intex pool for my children this summer. As it takes a lot of water and i am on a metre i don't want to keep draining and filling it. I thought i could use a float and 20g tablet, to keep it clean.

Is this going to be too much chlorine for that size pool. If not how often do you think they will need to be replaced?

I also have a solar cover for the pool.

Thanks

Sue




The number of chlorine(CL) tabs you'll use is dependent on some factors including sun, heat, use, splash out and refill (dilution of the CL), etc...

What you can do is test the water, put a couple of tabs in the float then re-test the chlorine a couple of days later to see where it is. If it's too high take the tabs out and allow the chlorine to come down to 1.5 - 3.5ppm.

If the CL doesn't increase you can add a tab.

The CL isn't the only thing to be concerned about. Balancing chemicals is a full process. While chlorine is an important part of the equation there's the other chemicals that come into play. If the pH is above 8.0 - 8.2 it renders the CL less effective. This will require a bit of acid to bring it down.

For a smaller play pool you can probably get away with CL tabs but if it starts to go green you'll need to treat it as a normal CL pool.

I hope this has answered your question to your satisfaction.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Chlorine" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of $35 per hour and I'll answer your questions by

phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going.

Thank you.









Hope this helps and have a great Summer.

Robert

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Pool Chlorine Tablets.

How Many 3 inch Chorine Tablets Should Be Consumed Per Week For A 35,000 gal Pool?

by Chuck
(Virginia)

We have just installed a new chlorine feeder and are having a difficult time keeping the chorine level up in spite of the fact that other indices are adequate.




Thanks for the question Chuck

How many chlorine tabs a pool uses has many variables including heat, direct sunlight, temperature of the pool, pool use, high pH and alkalinity, etc...

During the Summer with temperatures above 85 - 90 degrees, a normal 35,000 gallon pool can go through 4 - 6 tabs per week. The pools on my route in Arizona, at 112 degrees throughout the Summer, consumed 6 - 8 tabs per week.

If you're going through alot of tabs I'd encourage you to check the pH and stabilizer/cyanuric acid (CYA). Trichlor pucks have the CYA in them and you're consistently dosing your pool with CYA.

A higher CYA reading, above 80ppm, or low below 20ppm, will cause your chlorine be become less effective. This is the cause of many green pools. The normal range for CYA is 30 - 50ppm. If it's above 70 - 80ppm, a partial drain and refill is needed. There's no easy way to reduce CYA and no chemical to use. A water change is the best thing.

With the extra acid being put into the pool the pH may become low.

If the CYA is low you need to shock with Dichlor chlorine. This is a stabilized form of chlorine. Once you reach the 30 - 35ppm mark, stop with Dichlor and go back to regular liquid chlorine.

Be careful when using Dichlor as it can get out of hand quickly. For every 10ppm of chlorine added with Dichlor, you'll raise the CYA by 9ppm. For every 10ppm of chlorine added with Trichlor tabs you'll raise the CYA by 6ppm.

A high (150ppm or above) total alkalinity (TA) can also cause excess chlorine consumption.

There could be something else going on with the chemicals as well. I'd like to have your complete chemical readings:

Chlorine, CYA (cyanuric acid/stabilizer), pH, Alkalinity, Calcium Hardness, and Metals (iron and copper) and names of any algaecides you may have used along with clarifiers, phosphate removers, and/or flocs. It makes troubleshooting much easier.

If you need immediate assistance (within 24 hrs) or for emergency personal assistance, you can make a donation of your choice and I'll answer your questions by phone.

Contact Me

Donation

Hope this helps and have a great Summer.

Robert

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Pool Chlorine Tablets.

CYA Too High

by Larry Gibbs
(Los Angeles, CA)

I've had pools for over 50 years and never had this problem.

I just took a sample to Leslie's = the results:
Chlorine 8 ppm
CYA over 100 ppm
Alkalinity 110 ppm
pH 8.0

The pool was replastered and filled 1 year ago.
Using 3" chlorine tabs - in a floater anchored in front of the skimmer. They tell me my CYA is way out of line and they have a new treatment for only $48. YIKES

I live in Los Angeles - the middle of drought country. My water bill was high all last year because I filled the pool in April. I can't refill my pool every year.

The pool was beautiful all last year. Now, even though Cl is high, that green patina is starting.

What can I do?




Thanks for the question Larry

The product that you heard is probably Bio-Active. It does reduce the CYA but it's not a one-shot deal. You must maintain it and dose your pool with the product in order to keep the CYA in its range of 30 - 50ppm. It is an alternative to doing a partial drain and refill and it's a choice you're going to need to make. I understand CA is going through a drought and perhaps the BA is the way to go for now.

Next is to get your pH down. The range is 7.2 - 7.8. A pH of >8.0 - 8.2 means the FC is only about 25% active. Lowering the pH will help get the FC active once more.

With a CYA of 100ppm you'll need to maintain a FC of 7 - 8ppm. That's a lot of chlorine and money. The tabs you're using are probably Trichlor tabs. This means you're dosing your pool with CYA because these tabs are stabilized.

You have a few ways to go to get your pool back. First is to use the BA to maintain a CYA of 30 - 50ppm. 2nd is a partial drain and refill for the proper CYA range. Or maintain a FC of 7 - 8ppm and maintain the current CYA level and maintain a pH level of 7.2 - 7.8.

For an algae issue you need to lower the pH down to 7.0 then shock with liquid chlorine. It's 1 gallon per 10k gallons. Maintain a FC level of 12ppm and be sure your filter is perfectly working. Backwash every 12 hours.

If you feel your situation is more complex than this, I do phone 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.

Pool Consultation

Swimming Pool Care eBook

How To Clear Up A Green Pool eBook

Swimming Pool Resources

Hope this helps and have a great Summer.

Robert

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Pool Chlorine Tablets.

swimming pool care, basic pool care, above ground pool maintenance, inground, salt water

Click Here To Learn How This eBook Can Save You TONS Of Time & Money

Click Here To Learn The Best Way To Clear Up Your Pool 

Recent Articles

  1. Rusty Iron Bolt Stain

    I have a dark brown iron stain from a rusty bolt that the kids threw in my cement pool.

    Read More

  2. How Long Does Can We Swim After Adding Muriatic Acid To Lower The pH Level?

    We added muriatic acid to our pool to lower the swimming pool pH level. I need to know how long after we added it to swim. Thanks for your question James

    Read More

  3. Foam In The Water..Swimming Pool..How To Get Rid Of..

    We have a 20x40 kidney shaped gunite pool. It was backed washed yesterday and some DE added. Pool water tested o.k. but towards the evening bubbly or

    Read More