Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 11 of 11

Thread: Pool sample

  1. Back To Top    #1

    Join Date
    May 2012
    Location
    Danville, IN
    Posts
    21

    Pool sample

    I've done some searching but only found that pool sample should be taken 12-18" under the surface. My question is where should it be taken? Should it also be taken in the same place each time? Thanks!
    25K gal IG Vinyl Ell shaped pool, Pentair SuperFlo 1.5HP single speed pump,
    Pentair SandDollar sand filter (Zeobrite), Pentai Intellichlor IC40 Chlorine Generator

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Pool sample

    I think everyone has a spot that's easiest to reach for whatever reason - planters, decking, narrow walkways - so they tend to use the same spot every time. As long as it has decent circulation it should be fine.
    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!

  3. Back To Top    #3

    Join Date
    May 2012
    Location
    Danville, IN
    Posts
    21

    Re: Pool sample

    What's the best way to tell if a spot has good circulation?
    25K gal IG Vinyl Ell shaped pool, Pentair SuperFlo 1.5HP single speed pump,
    Pentair SandDollar sand filter (Zeobrite), Pentai Intellichlor IC40 Chlorine Generator

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Pool sample

    Quote Originally Posted by dk5jmiller
    What's the best way to tell if a spot has good circulation?
    You see ripples on the surface. Or you know it's downstream from a return if the return is pointed down.
    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!

  5. Back To Top    #5
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Pool sample

    You could take a little food coloring and squirt it in the location and if it's quickly carried away you'll be able to see how good the circulation is in that particular spot.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6

    Join Date
    May 2012
    Location
    Danville, IN
    Posts
    21

    Re: Pool sample

    Thanks! Great idea! I really appreciate your help. I've been in shock mode for a couple of days now. CC has never been more than 1, mostly 0.5 - but not able to hold OCLT yet. If my water is not sparkling though, I don't know what sparkling is... I usually get a lot of junk blown in my pool, so that may also be playing an effect. Have you seen pools where you simply cannot ever meet the OCLT?
    25K gal IG Vinyl Ell shaped pool, Pentair SuperFlo 1.5HP single speed pump,
    Pentair SandDollar sand filter (Zeobrite), Pentai Intellichlor IC40 Chlorine Generator

  7. Back To Top    #7
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Pool sample

    Never. It's designed so that every pool can pass it. If you can't pass it there's something going on that shouldn't be going on and it needs to be corrected.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  8. Back To Top    #8

    Join Date
    May 2012
    Location
    Danville, IN
    Posts
    21

    Re: Pool sample

    Ok, thanks. Just checking... I was indoctrinated in the pool store method of pool care and have only recently found this forum. I'm having to relearn some things, so I'm sure I'm just getting a little impatient. This is my first attempt at shocking, so I'm a little unsure of myself. Having my TF-100 sure has saved a lot of trips (and unnecessary purchases) from the pool shop.
    25K gal IG Vinyl Ell shaped pool, Pentair SuperFlo 1.5HP single speed pump,
    Pentair SandDollar sand filter (Zeobrite), Pentai Intellichlor IC40 Chlorine Generator

  9. Back To Top    #9

    Join Date
    May 2012
    Location
    Danville, IN
    Posts
    21

    Re: Pool sample

    Woohoo!! Water is crystal clear, CC is less than 0.5, and passed the OCLT last night. Since normal testing only tests to about 0.5ppm, I'm assuming that's why you meet the 3 criteria?

    How often should I expect to shock the pool? The pool store recommends shocking weekly, but they don't shock properly anyway. With the SWG, I was finding I could get by shocking every other week or so. Using the Pool School method, what might I expect for shocking intervals?
    25K gal IG Vinyl Ell shaped pool, Pentair SuperFlo 1.5HP single speed pump,
    Pentair SandDollar sand filter (Zeobrite), Pentai Intellichlor IC40 Chlorine Generator

  10. Back To Top    #10
    Smykowski's Avatar
    Join Date
    Sep 2011
    Location
    Gurnee, IL (North Suburban Chi-town)
    Posts
    3,065

    Re: Pool sample

    Correctly shocking, as practiced here, is used to solve a problem in your pool.

    As long as you maintain a proper chlorine level and water chemistry, you should never have to shock.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

  11. Back To Top    #11
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: Pool sample

    Smykowski is right on. This method of pool maintenance only uses the shocking process to fix problems and requires maintaining (generally) proper FC levels for normal operation, which then prevents organics from growing in the pool. If you end up needing to shock regularly, you are not following some portion of the method correctly.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

Posting Permissions

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