Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 25

Thread: Really confused on CYA

  1. Back To Top    #1

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Question Really confused on CYA

    So I'm at a loss for what's going on. Pool was doing fine on the auto chlorine feeder. I am trying to switch over to liquid only. Haven't been having any luck. Just started the such over last week. Chlorine has been dropping everyday. I have checked the CYA and it has been rising over the last couple months. Originally it was around 40 to 50 and FC was around 5 or 6. My CYA is now around 60 to 70. Confused on how it's creeping up. I haven't added any more to the pool. Think it could be the chlorine packs that go to my aqua smarte feeder? Now I noticed today that I'm starting to get a small amount of algae. I just scrubbed and cleaned the pool last Thursday and had people over to swim Friday. We had a ton of rain last week. Upwards of 4 inches over the week. So much that the water was coming out of the skimmer. Just looking for ideas on what to do. I'm considering going back to the auto feeder packs tomorrow. I just shocked the pool by adding in alot of liquid chlorine. Hoping to SLAM it and go from there.
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

  2. Back To Top    #2


    TFP Guide

    Join Date
    Jul 2015
    Location
    Central Valley CA
    Posts
    969

    Re: Really confused on CYA

    Quote Originally Posted by dleague View Post
    Think it could be the chlorine packs that go to my aqua smarte feeder? .
    Any chlorinating product that is powdered or granular is going to add either CYA or Calcium. CYA is the most common.
    12,300 Gallon, IG PebbleFina, 3 ft sheer, 2 Jandy nicheless LED lights, Jandy Pro 1.5HP VS pump (A.O. Smith Motor), PB4-60 Booster pump, Polaris 280, Jandy cv340 cartridge filter, Zodiac Z4 control panel W/iAquaLink, Stenner pumps for chlorine & MA connected to WiOn WiFi switches, TF-100. You can support TFP with AmazonSmile just click the link!

  3. Back To Top    #3
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    20,508

    Re: Really confused on CYA

    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  4. Back To Top    #4

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Re: Really confused on CYA

    The packs I was using were basically smaller tablets packed all into one package. In the process of SLAMming now. Waiting to see if that cleans up the algae. There isn't much but it just started. Want to get on it while I can. Also was going to get in the pool and scrub the edges. That's the only place I see the algae.
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

  5. Back To Top    #5

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Re: Really confused on CYA

    SLAM went good and passed. Still need to read up on switching over to the liquid though instead of just the packs. I did find out they contain trichlor. Which explains why my CYA kept going up. Scrubbed the pool though the other day during slamming and no signs of any green since. So good news. Appreciate this sign more and more I'm on it. Thank u everyone for the help!
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

  6. Back To Top    #6

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Really confused on CYA

    Congrats! I am assuming that "pass" was referring to the OCLT???

    Maybe using this tutorial will help with using liquid chlorine/bleach: Pool School - PoolMath

  7. Back To Top    #7

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Re: Really confused on CYA

    Fighting this algae. CYA still hovering around 60. Trying to keep the chlorine up around 7. But it drops fast. Then if I don't check it every single day it can run out then fighting algae. Not sure what's the best method for keeping chlorine up. All other chemicals are greathe in range. Just FC I'm battling. I read the chlorine part here on TFP. But mainly emphasizes bleach. I don't use the actual bleach but I have been using the liquid chlorine at 10%. But of course the store ran out. So switched back to the trichlor tans for now. Just lost at what to do. I had the algae gone and passed the OCLT after slamming everything was good. Then bam the chlorine runs a little low and algae in no time. Any suggestions? I'm baffled at this point.
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

  8. Back To Top    #8

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    Re: Really confused on CYA

    With CYA at 60 you should be targeting 7 ppm for FC. FC dissipates thru sunlight, evaporation, and battling algae and other organics. If the FC doesn't drop overnight, then you're not battling algae or organics - purely a result of sunlight and temperature in the day. Add sufficient chlorine every day to maintain that 7 ppm. If you let it drop too low you'll have algae problems again.

    You need to find liquid chlorine. Those tablets are going to give you CYA trouble.
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

  9. Back To Top    #9

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Really confused on CYA

    No more packs, no more pucks. They are raising your CYA.

    Bleach and liquid chlorine are the same chemical, just in different strengths. If you can't find liquid chlorine, please use bleach.

    If you are fighting algae, and you must be if you can't hold FC, you are going to have to slam: Pool School - SLAM - Shock Level And Maintain

  10. Back To Top    #10

    TFP Guide

    pabeader's Avatar
    Join Date
    May 2015
    Location
    Dallas Ga
    Posts
    3,642

    Re: Really confused on CYA

    Since you say you're battling algae, you should be targeting 24 FC. And checking it at least every couple of hours. As marian said, you should be SLAMMING that pool.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

  11. Back To Top    #11

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Re: Really confused on CYA

    Thank you for the quick responses! I can hold the FC and have passed the overnight test. But have let the chlorine get low twice now. Down to around 4 at the lowest and when that happens it get the algae within a day or 2 most. It's not bad algae where the whole pool is covered but it starts to where you can see it along the edging. I then typically raise the chlorine level up above the 7 to get rid of the algae asking with vacuuming and scrubbing the pool. Just crazy that letting it get down to around 4 on the FC with a CYA of 60 can flip the pool that quickly. I guess I'm going to have to use bleach since I couldn't find the liquid chlorine. But next month it will be time to close the pool up for the year. Am I going to have any issues with closing it? Don't really want to open the pool next year covered in algae. Newbie here and trying to learn as much as I can. I went thru the pool school and try to follow that. Just trying to understand better through experience and others. Appreciate all the help!
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

  12. Back To Top    #12

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Really confused on CYA

    It is amazing how fast a pool can turn for some people.

    If you slam now, and then close properly, the odds of you opening clear and balanced are very good. If you let it sit with algae over the winter, you could open to a swamp.

  13. Back To Top    #13

    Join Date
    Aug 2016
    Location
    Cincinnati, Oh
    Posts
    39

    Re: Really confused on CYA

    The only thing I can and will add here since I am also in Cincinnati is that Kroger is stocking pool shock (10% bleach) @ 9.99 for a case of 4. It's getting hard to find because of the time of the season but if you're on the east side the Eastgate Kroger still has cases. I'm sure others do but I only checked there since it's close.

    I converted to trouble free earlier this summer and underestimated how much chlorine my pool went through at first so I flirted with low chlorine levels till I got my Liquidator dialed in. I also learned the hard way that it is critical to take 5 minutes each day and test for chlorine and ph. Now it's just part of my routine so it's no biggie. Good luck and stick with it, now that my pool is under control I'm using about a gallon a week to keep it happy so it's becoming very economical compared to frequent visits to the pool store.
    10,350 In-Ground Vinyl
    Sand filter, 1.5 Pentair Pinnacle
    Municipal water source
    Liquidator
    K2006

  14. Back To Top    #14

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Really confused on CYA

    Just be careful of close-out sales. Check the date code on the bottle. It's usually a 6 digit number starting with the last two numbers of the year, (now would be 16), and then the julian date (What's the Current Day Number?). I have that link bookmarked on my phone.

    You don't want stuff that is beyond a couple of months old.

  15. Back To Top    #15
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Location
    Longview, Texas
    Posts
    4,868

    Re: Really confused on CYA

    How quickly your FC drops is primarily a result of 2 things. 1. How much UV your pool gets. UV destroys Free Chlorine. 2. Chlorine killing biological material such as algae, bacteria, eating on leaves and grass clippings, bugs and other such things. Also if your bather load is high, thats another thing that will consume the FC.

    If you have steps going into your pool, check on the bottom sides of the steps for any algae. Or steps with hollow legs or supports. Algae can get in there and eat up your FC. We see quite often that people forget to check these places. Check any place else you can possibly imaging where it will hide, beceause if it can, it will.

    As you are finding out, if you are using liquid chlorine, you need to add it every single day to keep it within range.


    Quote Originally Posted by dleague View Post
    Thank you for the quick responses! I can hold the FC and have passed the overnight test. But have let the chlorine get low twice now. Down to around 4 at the lowest and when that happens it get the algae within a day or 2 most. It's not bad algae where the whole pool is covered but it starts to where you can see it along the edging. I then typically raise the chlorine level up above the 7 to get rid of the algae asking with vacuuming and scrubbing the pool. Just crazy that letting it get down to around 4 on the FC with a CYA of 60 can flip the pool that quickly. I guess I'm going to have to use bleach since I couldn't find the liquid chlorine. But next month it will be time to close the pool up for the year. Am I going to have any issues with closing it? Don't really want to open the pool next year covered in algae. Newbie here and trying to learn as much as I can. I went thru the pool school and try to follow that. Just trying to understand better through experience and others. Appreciate all the help!
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  16. Back To Top    #16

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Re: Really confused on CYA

    So I have my FC level ironed out with the liquid bleach. Still having algae issues. It takes a few days for it to appear. I monitor the testing everyday. I have slammed the pool and passed the OCLT. But algae appears every few days. Usually it's a dark looking shadow color on the pool bottom and usually around the edges. I have talked with other people. Some have above ground and some have in ground. Everybody I know uses the chlorine tabs with no issue. Could it really be that simple as to switching over to those? I'm just lost. All my testing comes out good. My CYA is right around 60 to 70 aND I don't let the FC drop below 8. A few people have mentioned they put the auto pool cleaner in every few days. Or at least 2 to 3 times a week. I'm starting to do that. It cleans up the existing algae but doesn't keep it from coming back. I am not sure if it's because I have a tree nearby that is dropping a few leaves in the pool or what. Should I pull the steps out and give them a scrub? The pool will be shut down this time next month. Not sure what else I can do to keep things good until that time. I'm going to pay a pool company to come out and close it since it's the 1st time I've had a pool. Just so I can learn. But I'm baffled with the algae....
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

  17. Back To Top    #17

    Join Date
    Aug 2015
    Location
    Orlando
    Posts
    111

    Re: Really confused on CYA

    It may be helpful to post a full set of test results, from your own test kit. What may appear as one thing could be something else all together.
    Phil
    ~9600 gal gunite pool, NEW July 2015; Pentair Intelliflo 2 VST pump; Pentair C&C 150 filter; Pentair Intelliclor IC40 swg; solar heat w/ Pentair Solartouch controller, screened. Taylor K 2005 test kit, FAS-DPD separate test, Taylor K1766 salt test

  18. Back To Top    #18

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Really confused on CYA

    If you can, I would definitely pull the steps. It has happened before that people have passed an OCLT only to find that algae had returned. Steps and light niches are two common culprits. Usually we figure that out prior to completing a slam, but those hidey places can be tricky.

  19. Back To Top    #19

    TFP Guide

    pabeader's Avatar
    Join Date
    May 2015
    Location
    Dallas Ga
    Posts
    3,642

    Re: Really confused on CYA

    How often do you brush your pool?
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

  20. Back To Top    #20

    Join Date
    Jun 2016
    Location
    Cincinnati, OH
    Posts
    32

    Re: Really confused on CYA

    I brush about 3 times a week from the outside. Then I get in and vacuum and brush once a week. I'm leaning that the tree by the pool or the stairs are causing the issue. Getting ready to close it down for the year so the stairs are coming out.

    Latest test results
    FC 15
    PH 8 only cause the FC is up. Normal runs around 7.6
    TA 90
    CYA 65
    27' Aqua Leader Quantam AGP 19,300 Gallons
    Hayward 2HP pump, hi-low speed
    Hayward swim Pro 175 sq ft cartridge filter
    K-2006 test kit

Page 1 of 2 12 LastLast

Posting Permissions

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