Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Puerto Rico Summer -Very hot!! Adding CYA help

  1. Back To Top    #1

    Puerto Rico Summer -Very hot!! Adding CYA help

    Hello I'm from Puerto Rico as per the topic and summer is here. Temps are at 89°F Feels Like 92°F . What would be the recommended ppm for CYA to try and help with the chlorine loss from the SUN?? help please!!! my chlorine is dissapearing faster than a speeding bullet.

  2. Back To Top    #2
    Guest
    What is your current CYA level? If you would post a full set of test results we can help you better.

  3. Back To Top    #3
    Quote Originally Posted by waterbear
    What is your current CYA level? If you would post a full set of test results we can help you better.
    sorry for the trouble

    FC= 3ppm
    CC=0
    Total Alkalinity = 90ppm
    CYA- 30ppm
    pH= 7.5

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    If the pool is in direct sunlight all day you might want to try raising the CYA level into the 60 to 80 range. If you do that you will need to raise the FC level to between 5 and 10. The amount of chlorine lost to sunlight should be lower at the higher CYA level, despite the higher FC level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5
    Quote Originally Posted by JasonLion
    If the pool is in direct sunlight all day you might want to try raising the CYA level into the 60 to 80 range. If you do that you will need to raise the FC level to between 5 and 10. That amount of chlorine lost to sunlight should be lower at the higher CYA level, despite the higher FC level.
    The pool is in complete direct sunlight all day. I'm gonna do exactly as you suggest and bump it to 80, according to the pool calculator for a 30,000 gallons pool I would need to add 209 oz, is that correct??

    Thanks Jason

  6. Back To Top    #6
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    Yes, around 12 to 13 lbs of CYA. It is best to not add it all at once, but to add somewhat less than you think you need and see where that gets you and then adjust further from there. It is much easier to raise the CYA level than it is to lower it, so try not to overshoot.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. Back To Top    #7
    Quote Originally Posted by JasonLion
    Yes, around 12 to 13 lbs of CYA. It is best to not add it all at once, but to add somewhat less than you think you need and see where that gets you and then adjust further from there. It is much easier to raise the CYA level than it is to lower it, so try not to overshoot.
    Will do thanks Jason. I've been reading about adding the CYA... do you think is a wise idea to add 12lbs of CYA into the skimmer after backwashing and putting the filter pressure at 15psi for a week?? or adding it in portions ?

    I'm worried 12 lbs of CYA is going to clog my filter badly and I won't be able to backwash it for a week since it needs to get dissolved.

  8. Back To Top    #8
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    You need to add the CYA reasonably slowly, or it will clog the pump strainer basket. But once it get through that, which it will, it can sit in the filter safely without causing much of a pressure increase. CYA tends to be in fairly large crystals compared to the extremely fine dirt that will clog a filter. A whole bunch of coarse CYA crystals can fit in the filter without causing any problems.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

Posting Permissions

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