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

Thread: First time post, help with test exults and pool balance.

  1. Back To Top    #1

    Join Date
    Dec 2015
    Location
    Houston, Tx
    Posts
    2

    Post First time post, help with test exults and pool balance.

    I bought the TF-100 test kit and have been testing for a couple weeks. Here are my results.

    PH 8.2. (The best I can tell by matching colors)
    FC 8.5
    CC .5
    CH 275
    TA 150
    CYA 90
    ( filters are only 3 months old, and we're just cleaned 2 weeks ago)

    All Algae went away after I replaced filter cartridges 3Attachment 44231 months ago. Now I am seeing Algae. I haven't added any chlorine (tab or bleach) for 2 weeks. FC is still 8.5. According to FC/CYA chart I should bring FC upto shock level of 35 (I am in the Asterick range on the chart) Is this correct? I know my CYA is high and I need to lower my Ph before I Slam, but 35 seems so really high. FYI, we are planning to go with pebble tech in a couple months, that is why I haven't drained pool to lower CYA.

    Pool water is otherwise clear...just seeing green Algae on some stairs, and in the attached spa.

    your expert advice is much appreciated.

    cheers.

    PS...can't figure out how to place picture at bottom of post.
    Attached Images Attached Images
    16000 gall., In Ground, Plaster Pool with Chlorinator. Cartridge Filter. Attached spa, 3 water features. Houston, Tx

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: First time post, help with test exults and pool balance.

    Welcome! No matter what you do, you need to get your pH within testable ranges as it may be higher than 8.2 as that's as high as your kit can go. Lower it to 7.5 using MA (muriatic acid) according to pool math and then retest an hour or two later. (Some say only a half hour, but my pool takes 2 hours). Let us know.

  3. Back To Top    #3
    borjis's Avatar
    Join Date
    Aug 2014
    Location
    Pacific NW
    Posts
    2,058

    Re: First time post, help with test exults and pool balance.

    If you're going to redo the plaster in a few months and have no intention of swimming until next season,
    I'd probably just maintain it as is without slamming.

    if not:


    I know this sounds a bit conflicting but since you do need to SLAM, best to get the ph down to 7.2 first
    then bring it back to 7.5 when the slam is done.

    And yes FC of 35 will be necessary to kill this off at a cya of 90.

    I had that cya of 90 and a mustard algae issue last june.

    be prepared for strange looks and questions from strangers at the grocery store
    when you buy out the bleach shelf.

    based on my SLAM you will likely go through about 26 gallons of bleach before you are done,
    but I'd only get 10-12 at a time in case it ends up less.

    Also do the overnight chlorine loss test at least 3 times...once is seldom enough to confirm
    the algae is erradicated.

    pump on 24/7 during the slam and don't forget to brush the entire pool once or twice daily during the slam.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

  4. Back To Top    #4

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: First time post, help with test exults and pool balance.

    Is your chlorinator off? I don't think you had a signature when I first responded. Regardless, add MA as soon as possible to protect your equipment from the high pH. Let's go from there.

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: First time post, help with test exults and pool balance.

    Welcome to the forum.

    FYI, we are planning to go with pebble tech in a couple months,
    Then let your pool go. It is pointless to balance a pool that will be drained in 60 days at this time of year.

    While your pool is being replastered, I would read "The ABC's of Pool Water Chemistry" up in Pool School. That'll begin to teach you how your numbers got bad in the first place (yes, those are bad numbers) and what you can do to prevent that from reoccurring when your newly refinished pool id full.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    Dec 2015
    Location
    Houston, Tx
    Posts
    2

    Re: First time post, help with test exults and pool balance.

    Thanks for all the great responses. The pool came with the house we bought last July, so I have no idea how it was cared for before then. When I took control, I was told to keep the chlorinator full of tabs,shock every week and take water sample to pool store every 2 weeks. Then I found this website and realized the above method wasn't working.

    The chlorinator has been emptied and turned off. I want to continue to maintain the pool between now and resurfacing, because we like to use the spa with the heater on.

    what level of FC is safe to go I the pool/spa?

    cheers
    16000 gall., In Ground, Plaster Pool with Chlorinator. Cartridge Filter. Attached spa, 3 water features. Houston, Tx

  7. Back To Top    #7
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: First time post, help with test exults and pool balance.

    It's safe up to shock level, but it may be harsh on swim suits and cause some fading.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  8. Back To Top    #8

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: First time post, help with test exults and pool balance.

    If you want to balance your pool now, you must take the pool to shock level after lowering pH. That means FC at or slightly above shock level which is beyond TFP's recommended safe swimming levels. The process could take a while...

Posting Permissions

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