cya

  1. H

    Dichlor Shock and CYA Buildup

    For the past year or so, I've done sanitation and shock in my 500 gallon tub with Bromine and MPS mixes. I've recently shifted from MPS to a dichlor-based shock. Since my shocks are typically no more frequent than weekly, should I have any concern of CYA buildup? I don't do any CYA testing...
  2. T

    Desperate Algae Defeat

    First year pool owner. I’ve been following the pool stores directions on how to care for my pool. The pool store is also the same company that put the pool in for full disclosure. My pool is now completely green. They keep selling me I’ll decide to pour into it and telling me to turn my...
  3. Shrek60

    Excessive CYA leading to green pool?

    Approximately 6 weeks ago I added CYA to my pool. I am not sure exactly how I did so, but I put to much CYA in the pool. Now the walls of the pool turn green about every 10 days, to the chagrin of my wife and grandchildren. I am sure the high CYA is hurting the effectiveness of the Chlorine...
  4. A

    Am I on the right path? New pool owner - inherited a beast?

    Hi all! Happy to be here and posting. I've been reading pool school and all resources for the past few weeks and am hoping I'm on the right path, though I believe the only answer at this point is to drain and replace. I am trying to avoid right now. We did accidentally drain and replace about...
  5. Mcmitzi

    Keeping FC at 20% of CYA: Yes or No?

    First and foremost thank you to every contributor on this site. I’ve mined the old threads here and my pool is transformed! A piece of advice I see sometimes is “keep the chlorine at 20% of CYA” and I want to be sure that I am 1. Calculating that correctly and 2. That my pool qualifies for this...
  6. BaileysBrew

    High CYA, High Alkalinity/Hardness

    I'm in my second summer as a pool owner after purchasing a house last summer. I towed the same line as the previous owner and used Clorox Xtra Blue tabs and used basic testing strips. I didn't notice significant issues last year, but also wasn't looking as closely. This year startup went well...
  7. B

    CYA Disappearing quickly

    I can’t keep the CYA level up enough to keep the chlorine from getting eaten up by the sun. Has anyone else ever had problems keeping it up? What makes it go away? I am not backwashing much or draining and filling the pool. The guys at Leslies are perplexed but just want to sell me more CYA...
  8. amityeric

    CYA Levels Rising

    Hi All, My pool is 17,415 gallons. 11 days ago my CYA was 42. Today I tested (at the store; I’m ordering my own test kit today) and it was 54. I’ve done a backwash, added water AND only added two Trichlor tablets in those 11 days. Can two Trichlor pucks add that much CYA in 11 days? Seems...
  9. L

    salt water and CYA

    Hey guys, I recently had our nonfunctioning salt cell replaced and have switched over from chlorine to salt. I am confused about the CYA target. I thought it was a goal of 30-50 CYA for a chlorine pool, but I'm reading now it should be higher for a salt pool? Can someone explain this to me? I...
  10. P

    CYA level extremely high - need to drain / refill pool but have questions

    Hello all, my pool chemistry is out of whack and I would appreciate any advice. Our CYA is 185 ppm with Free Chlorine of 27ppm. Our PH is also very low based on using a test strip and from the Leslie's pool store test, which yielded a PH of 6.4. I tried to test PH with our Taylor kit but the...
  11. L

    Having trouble finding CYA, suggestions? (do NOT want to buy from Leslies)

    Walmart is out, Lowes and Home Depot seem to be out, and even Amazon is out. I just can't force myself to buy from Leslie's for double the price...ugh. Any suggestions on good cyanuric acid sources or is it sold in places other than the pool section of Lowes/Home Depot, etc?
  12. K

    High CYA and Draining

    Have been a pool owner for a couple of years and just discovered the TFP method. I used to go to the pool store and get the water tested and add the chemicals they gave me. Starting last year, I noticed that I would be constantly brushing up what I thought was dirt on the floor of the pool...
  13. M

    ETA: I think it’s a filter issue. Will know more tomorrow. Moderators feel free to delete thread. Thanks.

    Hi, SWG, floor cleaning system, intellichor pump, 27000 gallons inground, in the woods, sun morning, afternoon shade. Maryland. Running SWG at 60% for 10 hours a day. Water looking amazing. Ph was high, CYA low. PH 7.9 FC 5.0. TA 100 CH 300 CYA 0 80 °F Chlorine was a bit high for my tastes...
  14. M

    Low CYA every year...

    35,000 gallon in ground vinyl pool, SWG A few years back this forum helped me realize low CYA was my major problem (0-10 CYA in a Salt Water Pool). Once I got it up to 70 using the sock method I have a crystal clear pool that's very easy to maintain all season. My problem is the low CYA...
  15. Tinkertoy721

    High CYA, drained, now what?

    My husband and I bought our home last spring and it came with a pool that hadnt been opened in a year. The cover was ripped and the water was basically black. We removed the cover last summer because it was just shedding into the pool. We weren't living in the house yet so we couldn't devote...
  16. H

    Mustard algae treatment with higher CYA (75)

    Hello all. So my pool developed mustard algae, I think after the chlorine level decreased when I left town and with the heat and water evaporation, the water level went below the skimmer and warped some of the pipes, making the pump lose prime and stop working. The mustard algae, which I had...
  17. D

    New guy, new pool, zero CYA

    Hi guys. I'm new to the forum and to pools. I just installed a 20x40 (maybe 35,000 gallons?) vinyl liner salt water pool in Long Island, NY. It's been filled for less than a month. My pump runs from 8am til 8pm with the SWG at 85%. I just got my K2006C test kit and have been reading as much...
  18. Oregonpool214

    CYA - WHAT TO TRUST

    Hello all....... as I usually do at the beginning of every season, I take my water sample to the pool store JUST TO REMIND myself of how much I’m saving, how happy I am to not have to go in there all the time, and to see if I’m getting numbers anywhere close to what the pool store computer gets...
  19. J

    Where's my CYA

    Opened my pool yesterday morning and started testing. ph 7.2. CYA was 0, which I've not had before --usually there's at least some when I open in the spring. I added 5 lbs of dry stabilizer via skimmer sock. CYA should have at least been 20 , and my CYA test showed some cloudiness but was...
  20. Z

    Opened Pool - High CYA

    Hello Everyone, I opened my pool about a week ago and I'm dealing with a semi-cloudy pool (not bad, I can see main drain fine) and the smell of chloramines. I'm in the NE, I have loop lock cover and the pool water is usually disgusting when I open it - that's why I try to start early. I...
  21. LGLDSR73

    Pool Math Min / Max Parameter Changes?

    Greetings!! Recalling a 10" snowstorm on May 10th circa 1978 I'll roll the dice and say it anyway - thank God that Winter is gone and it's nearing the time to setup the pool. It's been a long, cold Winter here in the Northeast. Couple of quick questions. Have the Min / Max parameters for Pool...
  22. mgtfp

    Australia: How "granular" is your CYA?

    All the CYA I ever bought looked the same, no matter where I bought it - pool store, Aldi or Bunnings. I never questioned that it could look any different, and always assumed that this is what is called "granular" CYA here on TFP (to differentiate it from "liquid" CYA). Even though I always...
  23. Frankw1

    New pool owner with questions: CYA, Salt, Chlorine and other stuff

    Just bought a house with a pool. Pool appears to have been kept up very well and is only about 10 years old. In North Texas (Dallas) area. I knew nothing about pool keeping and have learned a bunch from online sources including this group. Very thankful for everybody here. One of the more...
  24. T

    Chlorine cost analysis

    Hi, I'd be curious to hear about everyone's experience with chlorination strategies to figure out what would work best for me. For many years, I've been using trichlor pucks along with calhypo for shock with mixed success. It's been pretty painful to deal with the high levels of CYA and the...
  25. matasoj

    About time to close, but CYA is about 110-115 due to the crappy chemicals from the pool store

    I found troublefreepool and the pool math app after I had already gone a month into maintaining our new 27' x 54" AGP using the chemicals purchased from the company that sold us the pool. Even just a month in, the CYA had climbed to above 60. I was still trying to figure out how everything for...
  26. rmozer

    CYA too high

    My CYA level (>90) appears to be interfering with my algae control. I understand that to reduce my CYA level, I have to pump down my pool and add fresh water. Can someone provide guidance on how much old water to remove and replace? My pool is 16 x 32 and has about 21,000 gallons. Thanks Bob
  27. T

    CYA amount in newly filled pool

    Hi friends, Just got a new liner and filled my 25,000 gallon pool I have a test kit and find that FC, TC, pH, are at the recommended level. But I have not added CYA. That level looks like 0 to me, as the black dot does not change. The Pool Math calculator seems to tell me to add 16 lbs. to my...
  28. sadohert

    Interpreting my CYA Level - How much does that black dot really disappear?

    TFP Friends - I think the key question I have here is whether my black dot has disappeared (see picture below)... I have other sub-questions I would love to hear feedback on. If that dot has disappeared, then I'd say my CYA is around 40, which I believe is too low and might explain how much...
  29. N

    Water Treatment - What Now?

    First, I want to say that we are first time pool owners of a 10k gallon, vinyl, filter cartridge using, chlorine eating, in ground pool, which came with our home purchase last fall. I've added what I know in the about me portion. If I didn't do something correctly just let me know. Based upon...
  30. AquaB

    Is it possible to run weekly cleaning services with BBB method?

    I have followed instruction from TFP in past two month and the result is amazing. Water is sparking clean with no need for shock for more than a month. I had to drain water once to lower CYA to around 60, but the problem was a left-over from previous use of dichlor and trichlor. I am...