Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Very Low CYA

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Merrimack NH
    Posts
    4

    Very Low CYA

    Hello all,

    First off I want to say a big "THANK YOU" to this website and forum. I converted to TFP last summer and it was a great experience. Thank you for all that you do.

    I opened the pool 3 days ago and here are my most recent stats:

    26,000 gallon gunite pool
    FC 8
    CC 0
    PH 7.5
    Alkalinity 70
    Calcium 260
    CYA Less than 30

    I tested my pool at noon today and I had FC of 9, just tested at at 7:00pm and FC was zero (full sun all day today in New Hampshire). I rushed and added two gallons of bleach to raise the chlorine. This brought my FC up to 8 and luckily I do not have any CC. I ran a CYA test earlier and I could still see the black dot after filling all the way, I figured this was because the water was very cold(61 degrees). After getting the zero FC reading at 7:00pm I redid the CYA test but brought the water to room temp first and I can still see the black dot which means my CYA is somewhere between 0 and 30.

    My question is: I have leftover pucks I bought last year before I converted to BBB. Should I add them to the empty automatic chlorinator to raise my CYA or should I buy stabilizer and do the sock trick? Is it imperative that I raise the CYA ASAP or will the stabilized pucks be enough to get me to 30 or 40 CYA eventually?

    Thank you again! You guys are amazing.
    -Matt
    26,000 gunite pool

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Very Low CYA

    Pucks take too long to dissolve. If you don't mind adding that much bleach every day to replace all that FC, use 'em. In the long run it would be cheaper to add enough stabilizer to get you above 30 and maybe use up some pucks bringing it up from there.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

    Join Date
    Jun 2014
    Location
    Merrimack NH
    Posts
    4

    Re: Very Low CYA

    Nice thank you for the help. One more question:

    I have a couple of 5 lb bottles of leftover Dichlor on hand as well as a jug of stabilizer. It seems with Dichlor I just can throw it in the pool to raise CYA where with the stabilizer I need to play the sock routine and run my filter continuously for days. Is there any reason not to use the dichlor over the stabilizer? I would prefer not to run the filter that much if I can help it.
    26,000 gunite pool

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Very Low CYA

    Quote Originally Posted by lavallee75 View Post
    Nice thank you for the help. One more question:

    I have a couple of 5 lb bottles of leftover Dichlor on hand as well as a jug of stabilizer. It seems with Dichlor I just can throw it in the pool to raise CYA where with the stabilizer I need to play the sock routine and run my filter continuously for days. Is there any reason not to use the dichlor over the stabilizer? I would prefer not to run the filter that much if I can help it.
    Dichlor is very acidic. Each five pound canister of dichlor will raise FC by13 , raise CYA by 12 and lower pH by .5. Check effects of Adding Chemicals at the bottom of poolmath.

    You don't have to leave the pump on 24/7. That's only if the sock is in the skimmer. Tie it to a pool noodle or something and let it bob around in the pool when the pump is off. Or suspend it from a pole in front of a return, so that it won't rub against the wall.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •