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

Thread: Confused about where my numbers should be??

  1. Back To Top    #1

    Confused about where my numbers should be??

    I love this site and completely trust the info I get from it. I'm just confused as to why the info i get from the pool store is so different? I shocked my pool last weekend and got my FC to 19 which is where the chart said it needed to be with my CYA. My total alkalinity was at 190, ph at 7.2. When i called the store and told them i shocked it and my FC was at 19 he acted like i was crazy. he said the highest they even test to is 10?? he also told me that my fc should be ok to keep it about 1 but the chart shows 3-4. Any ideas as to why the big difference?? Right now my FC is about 1 and cc is .5. Should i add some bleach to get my fc up? any suggestions on what number to set my chlorinator to?
    Jeremiah Hough

    22,000 gallon, vinyl liner, chlorine, with auto cover

  2. Back To Top    #2
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    Location
    East Texas
    Posts
    8,995

    Re: Confused about where my numbers should be??

    He should have said.....................the highest THEY can test to is 10. You should match your FC with the CYA/Chlorine chart in pool school.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  3. Back To Top    #3

    Join Date
    Mar 2012
    Location
    Amarillo, Texas
    Posts
    341

    Re: Confused about where my numbers should be??

    I think pool stores set you up for failure. If you keep your FC at 1, then there's a good chance you'll get some algae growth and guess what? They sell algae killer. It's a battle for the almighty dollar.
    18'x48" AG
    Pentair 1 1/2 HP Dynamo Pump
    Sand Dollar Sand Filter w/ Zeobrite
    Lil Shark Vacuum System
    Hard Plumbed

  4. Back To Top    #4

    Re: Confused about where my numbers should be??

    ok. i just went home and tested everything. Here are the results:

    fc = .5, cc - .5, tc = 1.0, ph 7.4, ta = 160, calcium hardness = 100 (the colors were pink then purple. i'm assuming that is red and blue?), cya = 48.

    everything seems to be good. i had a my chorinator set at 2.0 so i'm not sure why my fc keeps dropping. do you think i still have alae? there is something in the deep end corners but when i used my net to get it out it looks like grass clippings?? i'm not sure what algae looks like. the pool looks pretty clear.

    fyi - i shocked it last thursday and got my fc to 19 and i my overnight cl loss was 1.0.

    thanks again for all the help. i still can't believe the pool stores do that. i guess i'm to trusting.
    Jeremiah Hough

    22,000 gallon, vinyl liner, chlorine, with auto cover

  5. Back To Top    #5
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Confused about where my numbers should be??

    Pool Stores and the industry in general haven't acknowledged the chlorine/CYA relationship yet, so they keep recommending that the FC be kept between 1 and 3 regardless of what your CYA is.

    Also their testing is suspect for many reasons. Most use test strips and a reader which gets dirty and out of calibration all the time. They don't take the care that you will with testing. So there are a bunch of reasons their testing is different than yours and there are several reasons they recommend levels differently than we do.


    Which test kit do you have?

    With a CYA of 48 your FC is way too low and you most likely have algae. I'd suggest running an OCLT to confirm. Or just go ahead and shock the pool till you pass the OCLT.
    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

    Re: Confused about where my numbers should be??

    i have the tf 100. i have a slide. should i let it run a lot to try and lower the ta?
    Jeremiah Hough

    22,000 gallon, vinyl liner, chlorine, with auto cover

  7. Back To Top    #7
    Quinsee's Avatar
    Join Date
    Jun 2010
    Location
    Southern Indiana
    Posts
    32

    Re: Confused about where my numbers should be??

    Please edit your signature to include your pool/pump equipment size/configuration. That way it's on every post.

    It's hard to break free from the pool store mentality. "Shock is something you do, not something you buy." Please read Pool School's guide on how to -properly- shock your pool. pool-school/shocking_your_pool

    Your FC is really low for your CYA level. The presence of any CC means that the chlorine is busy working to get rid of organics. There are much more knowledgeable people on here, but I would recommend getting your FC up ASAP. Once you complete the shocking, and can pass all 3 of the qualifiers, then I would look at regulating your SWG to maintain FC levels. I don't have an SWG so I'll leave any advice on that to more experienced helpers.
    Pool School - Pool Calculator - Chlorine Best Price Calculator - CYA/Chlorine Chart
    24' AGP w/ 48" walls, 13500 gal., 150lb Hayward sand filter, Century 1.5hp pump, South central Indiana
    !!Don't melt your kids!! Muriatic Acid mixed with bleach produces Chlorine gas. KEEP THEM SEPARATED!!

  8. Back To Top    #8
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Confused about where my numbers should be??

    Don't worry about the TA until you know whether you need to shock and if you do until you're done with it.
    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

  9. Back To Top    #9
    WestSidePool's Avatar
    Join Date
    Jun 2009
    Location
    Cincinnati, OH
    Posts
    424

    Re: Confused about where my numbers should be??

    Quote Originally Posted by Quinsee
    then I would look at regulating your SWG to maintain FC levels. I don't have an SWG so I'll leave any advice on that to more experienced helpers.
    I don't believe they are using a SWG. It just sounds like an in-line chlorinator. Those use chlorine pucks or sticks.
    Is this true?
    If so I would avoid using those and the chlorinator unless you go on vacation or away from the pool for awhile. The pucks/sticks can add CYA to your pool over time raising the numbers. Your better off going with liquid bleach or chlorine.
    Eric

    IG 17x33 Grecian - Vinyl Liner (21k gallons), Hayward Pro-Grid DE 4820 filter, Hayward Super Pump, CompuPool SWG CPSC36, TF-100 Test Kit

  10. Back To Top    #10

    Re: Confused about where my numbers should be??

    yes. it's just an in-line chlorinator. sorry, i'm still learning what everything is called. so don't use the chlorinator unless i'm going to be gone for awhile? just add bleach daily?
    Jeremiah Hough

    22,000 gallon, vinyl liner, chlorine, with auto cover

  11. Back To Top    #11
    WestSidePool's Avatar
    Join Date
    Jun 2009
    Location
    Cincinnati, OH
    Posts
    424

    Re: Confused about where my numbers should be??

    Quote Originally Posted by miahhough
    yes. it's just an in-line chlorinator. sorry, i'm still learning what everything is called. so don't use the chlorinator unless i'm going to be gone for awhile? just add bleach daily?
    That's what I would do.
    I took my in-line chlorinator out and installed a SWG. I found it useless to manage/monitor (honestly, how much chlorine is it putting in when you set it to 2, or 6? you really don't know).
    With Chlorine/Bleach it's easy to use the pool calculator to find out how much to add since you can use a measuring cup.
    Eric

    IG 17x33 Grecian - Vinyl Liner (21k gallons), Hayward Pro-Grid DE 4820 filter, Hayward Super Pump, CompuPool SWG CPSC36, TF-100 Test Kit

Posting Permissions

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