Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: starting BBB with CYA at 70

  1. Back To Top    #1

    Join Date
    Aug 2008
    Location
    Rochester, NY
    Posts
    48

    starting BBB with CYA at 70

    Hi, I've been lurking for awhile and this is my first post. We had a 20000 gal inground put in 2 years ago. It is currently on an autofeed trichlor system with 3" pucks. I want to switch to household bleach. I just had my water tested at a pool store and the CYA level came back at 70. I have also invested in a Taylor k-2006 test kit but haven't received it yet. My question is...If my CYA level is actually at 70 and i switch to liquid bleach, will that be the highest the CYA will get? Will it start to diminish with water replacement from filter backwashes, lowering levels after rain storms, splashout etc? Thanks for any help.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

  2. Back To Top    #2

    Join Date
    May 2010
    Location
    SW Georgia
    Posts
    298

    Re: starting BBB with CYA at 70

    I agree with your assessment.
    35K IG Vinyl 20 x 40 self built pool, Hayward Pro Series High-Rate Sand Filter 31" 98gal/min, Hayward TriStar 1.85hp, Hayward 400btu heater, BBB method w/Hypo, Jazz light w/matching fiber optic rope lighting around coping w/syncronized color wheels. Concrete Paver deck.

  3. Back To Top    #3

    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: starting BBB with CYA at 70

    Once the pucks you have in there are gone, the CYA will stop rising. I wouldn't throw them away as the pucks are still useful for times when you are away on vacation or other trip (I keep mine for that reason). And yes, CYA will gradually drop over time for the reasons you say.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  4. Back To Top    #4

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,085

    Re: starting BBB with CYA at 70

    Welcome to TFP! (or at least to your first posting)
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  5. Back To Top    #5
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: starting BBB with CYA at 70

    Welcome to the forum

    You've been around for quite a while.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  6. Back To Top    #6

    Join Date
    Aug 2008
    Location
    Rochester, NY
    Posts
    48

    Re: starting BBB with CYA at 70

    Thanks for the reply's and the welcomes. I am finding this forum a VERY valuable source of pool education. I am really starting to understand what all the #'s mean instead of staring blankly at a printed sheet from the pool company and buying what they tell me to.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

  7. Back To Top    #7
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,963

    Re: starting BBB with CYA at 70

    When I first found TFP my CYA was over 100. After a few partial drains and refills, I was able to lower it to 70. I got thru the 2007 summer at 70. 2008 I lowered it to 50. In 2009 we had a ton of rain and I actually found myself adding some CYA.

    Again this spring, it's low, around 20 - I've got trichlor in a floater for now..... never thought I'd do that again!

    Welcome to TFP!
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

Posting Permissions

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