Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Testing question

  1. Back To Top    #1

    Join Date
    Apr 2015
    Location
    La Vernia, Tx
    Posts
    29

    Testing question

    Our new pool was filled about 32 days ago and my wife has been using a TF-100 kit to test the water each day. We had to use some trichlor tabs to start with d/t PB warranty, but have been supplementing with bleach each day. Our CYA is 30, but we are waiting for the last puck to dissolve before we add any more dry CYA as we don't want to over shoot. Our levels have been great and our water is crystal clear. My wife uses the TC and drop test each day and often morning and evening. She tries to maintain chlorine above the target level since we are in full sun, have kids that swim daily.

    Yesterday at about 4pm: FC of 8 and CC of 0.5 (FC usually between 4 and 8. CC never above 0.5 and usually at 0).
    Today at 11:45: TC of 5+. Only did TC test as we have not had an overnight loss since we began testing.
    Today at 5pm: TC 5. FC of 2.5 and CC of 1.5

    Water looks sparkling clear, but I guess we will SLAM.

    My questions: Why even do the general TC test if it does not differentiate free chlorine and combined chloramines? Also, how often do people do a drop test for FC and CC? The kit says once per week, but if everything can be good for a month and the TC test shows 5, it could have been several days before I would have known that CCs are high and I needed to SLAM. I'm not knocking the kit or the method, just trying to better understand.

    Okay, since I started to type this email, myy wife used our new speed stir for the first time (came in the mail this week) and said it was much easier and felt more immediate and precise. Now, we have ZERO CC's and a FC level of 10 (initially added enough to take us from 2.5 to 6)

    So, could using the speed stir really make our testing more efficient, or are we just screwed up? Now I assume we dont SLAM? Sorry for the long winded post. Any advice is much appreciated.

    Eric
    16.5 x 34 gunite freeform/angular, 3.5-5.5 ft depth, traditional chlorine, 6ft of benches, sun shelf, 2 Bermuda skimmers/5 directional inlets, 3hp VS Pentair pump, 30in Pentair sand filter, Legend cleaner w/booster, 2 - 5G LED color lights, LED color bubbler, flagstone coping, 600 sq ft kool deck, Wet Edge Satin Matrix-Antigua

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: Testing question

    I don't think you need to SLAM. Could be timing of excess bather load being oxidized. How old are the kids? Anyone young enough to make extra contributions to the pool? Urine would create a spike in CC. Yes, the speed stir can increase accuracy of the tests. Generally if there is a problem with algae or something in the pool consuming chlorine TC will drop day by day. So, a random spike in CC is not necessarily a big problem.
    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

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Testing question

    The speedstir makes a huge difference in testing. That said... you might be trying to go too fast and squeezing the bottle which makes the drops fly off sooner and smaller.

    The colormatching test is mostly a sanity check. Eventually you'll know your pool so well that you can just give that a glance and know things are normal and add the usual between 2 or 3 times a week FAS-DPD testing.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  4. Back To Top    #4

    Join Date
    Apr 2015
    Location
    La Vernia, Tx
    Posts
    29

    Re: Testing question

    Thanks Pooldv and Richard320. I really appreciate the quick, helpful responses that the two of you always give.
    16.5 x 34 gunite freeform/angular, 3.5-5.5 ft depth, traditional chlorine, 6ft of benches, sun shelf, 2 Bermuda skimmers/5 directional inlets, 3hp VS Pentair pump, 30in Pentair sand filter, Legend cleaner w/booster, 2 - 5G LED color lights, LED color bubbler, flagstone coping, 600 sq ft kool deck, Wet Edge Satin Matrix-Antigua

  5. Back To Top    #5

    Join Date
    Jul 2012
    Location
    Central Texas
    Posts
    436

    Re: Testing question

    Your mileage may vary over time, but I test my pH and Chlorine every other day.
    Central TX / 12K GAL / IG / SWG / DE filter / Pentair SVRS & 3 swim jet pumps / Spa bench and jets / Single body of water / No heater.

Posting Permissions

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