+ Reply to Thread
Page 4 of 5 FirstFirst ... 2 3 4 5 LastLast
Results 31 to 40 of 42

Thread: Jandy SWCG's "optimal" water conditions: why raise CYA?

  1. #31
    waterbear's Avatar
    waterbear is offline Lifetime Member Sniggle Mechanic waterbear 4 stars waterbear 4 stars waterbear 4 stars waterbear 4 stars
    Join Date
    Nov 2004
    Location
    St. Augustine, Fl
    Age
    71
    Posts
    3,743

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    NOW you are catching on to why we say to test the water yourself with a good test kit!
    Retired pool store and commercial pool maintenance guy.

  2. #32
    Join Date
    May 2010
    Location
    Arizona
    Posts
    255

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    Thanks Evan. I appreciate your reply. I am embarrased, and publically admit you were right about the CYA. I must have read the Pool Info, Not the SWCG info. Please accept my apologies.

    In my case a few years ago, the Problem with the CYA was on a Fresh fill. I drained my pool to less than 1 inch of water and refilled. After adding the CYA, and discovered the "high CYA Problem", I had the water tested at three different pool stores (before I ever heard of this Forum) and not one could find anything wrong with my pool chemistry. The unanimous consensus was high CYA as the cause of the eye irritation. I cannot explain how 4 Lbs. of CYA took me to readings in excess of 110 PPM in approximately 11,000 gallons of water, nor can I explain why draining 2/3 of the pool water (the following year) and refilling with fresh water took me to 100 ppm. But that pool and all its water and problems are long gone, so it will remain a mystery.

    Yes I am a slow learner, I don't just go out and buy or do everything everyone tells me to until I investigate it. After all when your own children and grandchildren tell you that their eyes burn in your pool, I will err on the the side of caution. As far as the test kit is concerned, my old one was barely adequate, but wouldn't test CYA, so yes, I ordered the Taylor.

    Thanks again Evan, and Peace.

    Rick.
    Last edited by BigTallGuy; 07-31-2011 at 01:49 AM.
    If you can afford a swimming pool and computer, you can probably afford to help keep the PoolForum alive. Please be a responsible member and subscribe today. You'll probably save more than the membership fee on your first trip to the pool store. BTG

  3. #33
    waterbear's Avatar
    waterbear is offline Lifetime Member Sniggle Mechanic waterbear 4 stars waterbear 4 stars waterbear 4 stars waterbear 4 stars
    Join Date
    Nov 2004
    Location
    St. Augustine, Fl
    Age
    71
    Posts
    3,743

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    Quote Originally Posted by BigTallDumbGuy View Post
    Thanks Evan. I appreciate your reply. I am embarrased, and publically admit you were right about the CYA. I must have read the Pool Info, Not the SWCG info. Please accept my apologies.

    In my case a few years ago, the Problem with the CYA was on a Fresh fill. I drained my pool to less than 1 inch of water and refilled. After adding the CYA, and discovered the "high CYA Problem", I had the water tested at three different pool stores (before I ever heard of this Forum) and not one could find anything wrong with my pool chemistry. The unanimous consensus was high CYA as the cause of the eye irritation. I cannot explain how 4 Lbs. of CYA took me to readings in excess of 110 PPM in approximately 11,000 gallons of water, nor can I explain why draining 2/3 of the pool water (the following year) and refilling with fresh water took me to 100 ppm. But that pool and all its water and problems are long gone, so it will remain a mystery.
    No mystery at all. I have seen it many times. When CYA levels are very hiigh for an extended period of time CYA tends to deposit in the plumbimg and pool surfaces and when you refill it residdolves and brings the level higher than you expect. As far as the pool store folk not knowing why the water was making burning eyes...well, since I used to work in a pool store I don't have a lot of respect for a lot of people that work in them, 'nuff said?

    Yes I am a slow learner, I don't just go out and buy or do everything everyone tells me to until I investigate it. After all when your own children and grandchildren tell you that their eyes burn in your pool, I will err on the the side of caution.
    But how do you know which way to err? Less is not always best (as the best guess chart shows with chlorine levels!)
    Hypothetical point, If there were burning eyes and the pool store said that everything was fine (because their testing method bleached out at high chlorine levels and could not detect the combined chlorine in the water--actually, I have seen this happen--and someone else said to add more chloirne to get rid of the burning eyes but your chlorine was already high (and your CYA was high). would you give it a try to see if it worked? I believe you know enough about pool chemistry now to know it would!


    As far as the test kit is concerned, my old one was barely adequate, but wouldn't test CYA, so yes, I ordered the Taylor.
    Have you received the Taylor kit yet? I think you will find there is a BIG difference between 'barely adequate' and a good test kit. If I remember right your old test kit was OTO and not DPD. There is a reason that the Taylor kit is recommended, otherwise we would probably recommend getting a cheap '5-way' kit from Ace Hardware and adding a CYA test to it. The end result is so different it is a case of apples and oranges!
    Last edited by waterbear; 07-31-2011 at 12:09 PM.
    Retired pool store and commercial pool maintenance guy.

  4. #34
    Join Date
    Jul 2011
    Location
    Boca Raton, FL
    Posts
    126

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    Quote Originally Posted by waterbear View Post
    NOW you are catching on to why we say to test the water yourself with a good test kit!
    Yes, I've caught on, alright. I'll happily sing the praises of self-testing one's own pool water to whoever will listen to me. I've got a friend at work who just bought a house with a pool (he's a first-time pool owner now), and I'm anxious to show him my recent "pro" test results to emphasize the point he should test his own water, rather than relying on his pool service or a nearby Leslie's pool store.
    South Florida - 16,000g Diamond Brite pool, 700g spa & waterfall, Jandy 1400 AquaPure SWCG, Jandy variable-speed 1.5H pump, Jandy 60 DE filter, Jandy heat pump - using Taylor K-2006 kit

  5. #35
    Join Date
    May 2010
    Location
    Arizona
    Posts
    255

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    Quote Originally Posted by waterbear View Post
    Have you received the Taylor kit yet? I think you will find there is a BIG difference between 'barely adequate' and a good test kit. If I remember right your old test kit was OTO and not DPD. There is a reason that the Taylor kit is recommended, otherwise we would probably recommend getting a cheap '5-way' kit from Ace Hardware and adding a CYA test to it. The end result is so different it is a case of apples and oranges!
    Not yet. I am expecting it this week. I am looking forward to working with this kit when it arrives.

    Yes, barely adequate vs. good, I'm sure is miles apart. But for the record, since May, 2010, when I converted to Salt along with a new liner and fresh water, My pool has been sparkling clean, without a single algae bloom or "green" day, and no burning eyes (thanks to many people on this Forum) I only have had to add bleach one time. All with my old test kit and a few tests at the pool store. So justifying the $57 for a Taylor kit was a little rough. My last bout with the CYA levels (different Thread) was the last straw.

    The residual CYA in the liner, plumbing etc. was suggested before and is the only thing that makes sense, as it would be chemically impossible to repeat the readings with 4 Lbs. of CYA. I didn't know until now if this was a real possibility or a theory. Thanks for clearing that up.
    If you can afford a swimming pool and computer, you can probably afford to help keep the PoolForum alive. Please be a responsible member and subscribe today. You'll probably save more than the membership fee on your first trip to the pool store. BTG

  6. #36
    PoolDoc's Avatar
    PoolDoc is offline Administrator Quark Inspector PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars PoolDoc 5 stars
    Join Date
    Jan 2005
    Location
    Georgia
    Posts
    11,386

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    I can't see any way you could stow 4# of dissolved CYA in the liner and pipes. Not sure who suggested that, but unless it was Chem_Geek, I'd forget about it. If it WAS Chem_Geek, I've got a bunch of questions for him.

    Ben

  7. #37
    chem geek is offline PF Supporter Whibble Konker chem geek 4 stars chem geek 4 stars chem geek 4 stars chem geek 4 stars
    Join Date
    Nov 2004
    Location
    California
    Age
    66
    Posts
    2,226

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    BigTallDumbGuy was referring to waterbear's post where he wrote "When CYA levels are very hiigh for an extended period of time CYA tends to deposit in the plumbimg and pool surfaces and when you refill it residdolves and brings the level higher than you expect." I have heard that before in the context of there being a small amount of residual CYA reading in spite of pools being drained. However, 4 pounds of CYA in 11,000 gallons is 44 ppm and that's much higher than the kind of residual that can be left over. Since a proper test kit was never used in the pool being described that had CYA in it, I don't think it's worth spending any time trying to figure it out.

  8. #38
    Join Date
    May 2010
    Location
    Arizona
    Posts
    255

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    I agree Chemgeek, it is not worth trying to figure out. As I stated, that pool and its issues are long gone. However, there are 3 facts to consider.

    1, Multiple vanishing black dot tests were performed at 3 different pool stores, and I'm sorry but I can't believe ALL of the tests were faulty tests. In all total, at least 6 different test were performed (2 per store). I asked each of the people performing the tests to be very careful with their testing. My CYA was over 100, way over.

    2, High CYA readings (over 100) are reportedly difficult to read unless you do a little fancy dilution with distilled water, which none of the pool stores did.

    3, I bought a 6 Lb. bottle and took the remaining unused CYA back to the pool store and had it weighed. with the bottle, there was 2.1 Lbs of unused CYA left over out of the original 6 Lbs. So I can say it with a pretty high degree of accuracy that 4 Lbs. was all I put in.
    If you can afford a swimming pool and computer, you can probably afford to help keep the PoolForum alive. Please be a responsible member and subscribe today. You'll probably save more than the membership fee on your first trip to the pool store. BTG

  9. #39
    waterbear's Avatar
    waterbear is offline Lifetime Member Sniggle Mechanic waterbear 4 stars waterbear 4 stars waterbear 4 stars waterbear 4 stars
    Join Date
    Nov 2004
    Location
    St. Augustine, Fl
    Age
    71
    Posts
    3,743

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    Quote Originally Posted by BigTallDumbGuy View Post

    1, Multiple vanishing black dot tests were performed at 3 different pool stores, and I'm sorry but I can't believe ALL of the tests were faulty tests. In all total, at least 6 different test were performed (2 per store). I asked each of the people performing the tests to be very careful with their testing. My CYA was over 100, way over.

    2, High CYA readings (over 100) are reportedly difficult to read unless you do a little fancy dilution with distilled water, which none of the pool stores did.

    .
    And there you have it. It is IMPOSSIBLE to know how much over 100 it is without diluting and with dilution you lose precision. The CYA level might have been MUCH higher than thought. Many people, including pool store employees do not understand what precision means in water testing. Ben used to have a very good explanation page on PoolSolutions but it does not seem to be there anymore.
    Retired pool store and commercial pool maintenance guy.

  10. #40
    Join Date
    Nov 2004
    Location
    Houston.
    Posts
    52

    Default Re: Jandy SWCG's "optimal" water conditions: why raise CYA?

    Quote Originally Posted by BigTallDumbGuy View Post
    SO HERE IS MY QUESTION TO ANY AND ALL POOL OWNERS WITH A SWCG THAT KEEP THEIR CYA AT 80 PPM AND THEIR CHLORINE AT 4.0 OR HIGHER, DO YOU EXPERIENCE OR GET COMPLAINTS ABOUT BURNING EYES? BE HONEST, BECAUSE THAT WAS MY EXPERIENCE.
    I don't feel any burning. If my son swims in our pool, he'll have pretty clear eyes later on. He came home the other day after swimming in a public pool and his eyes were bright red. I have no idea what the chemicals were like in the public pool.
    ~~
    22K gallon, IG, gunite, Sunstone Pearl White Pearl plaster, Aqualogic SWCG, Hayward Tristar pool pump, Pentair Whisperflo waterfall pump, Pentair Clean & Clear 320 cartridge filter, Sta-Rite heater.

+ Reply to Thread

Similar Threads

  1. Jandy LRZ "Check IGN Control"
    By nowazzu in forum Pool Equipment & Operations
    Replies: 3
    Last Post: 04-10-2012, 03:41 PM
  2. Using suggested SWCG "tweaking" methods
    By DennyB65 in forum Salt Generators (SWCG) & other Chlorine Feeders
    Replies: 2
    Last Post: 05-30-2011, 11:54 AM
  3. "Recipe" for SWCG pools??
    By Jodester in forum Pool Chemicals & Pool Water Problems
    Replies: 3
    Last Post: 09-22-2010, 06:50 AM
  4. Can a leaking Jandy "Check Valve" with clear top be "fixed"?
    By 105ex in forum Pool Equipment & Operations
    Replies: 3
    Last Post: 05-29-2010, 08:17 AM
  5. Jandy actuators going "wrong way"
    By stualden in forum Pool Equipment & Operations
    Replies: 1
    Last Post: 06-08-2006, 04:18 PM

Bookmarks

Posting Permissions

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