Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 19 of 19

Thread: 7/12/16.Spots No noticeable change

  1. Back To Top    #1

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    7/12/16.Spots No noticeable change

    Test kit TF100 came today
    ran tests and here are the results
    fc oto 5 Ph 7.5 Cya 22. Ta 100. Chlorine drop test fc test 4, cc 0

    I am still trying to get rid of the mostly faded spots on the bottom
    so pool math said to do what I have been doing added another gallon of Walmart 10% liquid chlorine

    I need to get something to raise the cya

    anything else?
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Test kit arrived today, test results, still have bottom organics

    Get regular CYA to raise the CYA. I'd dose enough to get to 50 ppm

    What does your water look like?

    (Take that "Test Strip" statement out of your sig.....Congratulations on your TF-100!!)
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Test kit arrived today, test results, still have bottom organics

    Quote Originally Posted by duraleigh View Post
    Get regular CYA to raise the CYA. I'd dose enough to get to 50 ppm

    What does your water look like?

    (Take that "Test Strip" statement out of your sig.....Congratulations on your TF-100!!)
    Water is crystal clear
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  4. Back To Top    #4

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Test kit arrived today, test results, still have bottom organics

    YOur numbers look very good. Raise the CYA up to about 50 ppm and then keep the FC between 3 - 5.

    Looks like you are in business for a great end of the season swim for the next couple of months!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Test kit arrived today, test results, still have bottom organics

    Today I added cya , Clorox granular cya
    and was surprised that 2 pounds in a sock was
    dissolved during the 4 hours I was away.
    I think I read not to take a Cya reading for a week
    i took one anyway and it read 50
    so can I Assume it will lower over the week?
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  6. Back To Top    #6

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: Test kit arrived today, test results, still have bottom organics

    Quote Originally Posted by soulfixinman View Post
    Today I added cya , Clorox granular cya
    and was surprised that 2 pounds in a sock was
    dissolved during the 4 hours I was away.
    I think I read not to take a Cya reading for a week
    i took one anyway and it read 50
    so can I Assume it will lower over the week?
    Congrats on a great test kit. CYA doesn't go away without draining and replacing water or a reverse osmosis treatment (rare). The reason more often in the past it was reccomended to wait a week is because of how long it could take to dissolve if added directly to the pool or in a skimmer to the filter. If it was all dissolved out of the sock, you can pretty much count on it being there.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

  7. Back To Top    #7

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Test kit arrived today, test results, still have bottom organics

    My pool has been crystal clear for many days
    i started taking the FC level way up as soon as I determined that the spots on the bottom were organic
    I did that with granular shock in a sock held down on some of the spots
    The black to dark greenish spots are covering about 1/4 of my pool
    They seem to have lightened some but are still very much there with the water crystal clear
    With my cya now at 50 I brought the fc up to 16 as calculated to slam it
    Today is really the second day I took it to that level.

    The spots are very much like stains you can scrape nothing off the vinyl
    every 8 hours or so there is black material which is very wispy, it disappears when I brush
    I have been vacuuming it up every day

    Do these spots really sound like algae?
    I have been reading posts where the water is not clear with algae
    How long would it normally take to clear the spots up?
    Am I on the right path.?
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  8. Back To Top    #8

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Test kit arrived today, test results, still have bottom organics

    We need a picture of the spots
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  9. Back To Top    #9

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Test kit arrived today, test results, still have bottom organics

    IMG_7619.jpgIMG_7617.jpgIMG_7612.jpg
    Quote Originally Posted by duraleigh View Post
    We need a picture of the spots
    Attached Images Attached Images
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  10. Back To Top    #10

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Spots on bottom, pictures added

    Morning test of FC. was at 15
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  11. Back To Top    #11

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Spots on bottom, pictures added

    Had a copper test done today, pool store said at .4
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  12. Back To Top    #12

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Spots on bottom, pictures added

    Just looking I would say it is calcium scale with algae and dirt imbedded. Put a Tri-chlor puck on the stains for about 10 minutes and see what the result is. If the stains are organic, they will lighten considerable.

    If they don't, crush up some cheap vitamin C tabs (maybe 15) and put them in a sock then put a brick or rock onto the sock and sit it in the middle of the stain. leave it about the same 10 minutes and then report back the results of both tests. We'll go from there.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  13. Back To Top    #13

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Spots on bottom, pictures added

    Today I bought vitamin c and tested for metals after a pool store told me my copper was at .4
    i went there only for the copper test....
    on a funny note looking at there recomendations, they want to sell me 38 pounds of chemicals!
    anyway I saw no change after holding a bottle of crushed AA in a sock for several minutes
    i them used a triclor puck and after several tests determined it was fading the stains.
    i am doing a chlorine overnight test.
    i am wondering about the scaling,
    In one post an expert commented that scaling seems to go away
    in bright sunlight and seems much darker in shade, my stains are like that, how should scale react to the triclor puck.
    also did a CH test tonight results were CH 25
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  14. Back To Top    #14

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Spots on bottom, pictures added

    There is no point in doing the OCLT. You have a combination of staining, I think but it is surely unusual to find it on a vinyl liner. What do the stains feel like when you rub them with your hands. How often have you tried vigorous brushing on them?

    How long have you owned this pool?

    Did you ever test for pH?

    What does the water look like now?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  15. Back To Top    #15

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Spots on bottom, pictures added

    - - - Updated - - -

    Quote Originally Posted by duraleigh View Post
    There is no point in doing the OCLT. You have a combination of staining, I think but it is surely unusual to find it on a vinyl liner. What do the stains feel like when you rub them with your hands. How often have you tried vigorous brushing on them?
    the stains feel like the liner, I brush them 3-4 times a day, no change when I brush, am using a pool brush to do it

    How long have you owned this pool? Pool came with my home, it was green swamp, but we cleaned it up spring of 2014

    Did you ever test for pH? Yes ph was 7.5 when I started socking it

    What does the water look like now? Very clear
    here are my reading when I first got test kit from post #1

    fc oto 5 Ph 7.5 Cya 22. Ta 100. Chlorine drop test fc test 4, cc 0, ch 25
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  16. Back To Top    #16

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    7/12/16.Spots No noticeable change

    I followed through with the oclt test which was 2
    Is there a way to test for calcium scale
    I did not do a calcium hardness till last night and it was only 25
    also pool math says my csi is -0.91
    very evident today that you can barely see the spots in the bright sunlight part of the day
    but as soon as the sun starts setting there they are
    I will continue bumping it up to shock level fc14?
    Last edited by soulfixinman; 07-12-2016 at 07:21 PM. Reason: Clarity
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  17. Back To Top    #17
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Spots on bottom, pictures added

    With CSI negative and CH at 25 calcium scale is unlikely. Calcium scale will feel rough to the touch and raised above the surface of the pool.

    If trichlor lightens the stain then it is organic. You can raise FC several ppm above target for your CYA,FC/CYA Chart, and brush daily to lighten it further over a couple of weeks. Maybe longer if the stains have been there a while.
    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

  18. Back To Top    #18

    Join Date
    Jul 2016
    Location
    Summerville, SC
    Posts
    15

    Re: Spots on bottom, pictures added

    Quote Originally Posted by pooldv View Post
    With CSI negative and CH at 25 calcium scale is unlikely. Calcium scale will feel rough to the touch and raised above the surface of the pool.

    If trichlor lightens the stain then it is organic. You can raise FC several ppm above target for your CYA,FC/CYA Chart, and brush daily to lighten it further over a couple of weeks. Maybe longer if the stains have been there a while.
    Pooldv So if my normal range is 3-7 with. Cya of 35 what would several above be?
    I have been running at shock level of 14 for a long time and brushing
    TF100, 15k gallons, 27 ft round, AG, Vinyl, Hayward Sand,
    Hayward 1 hp, City Water

  19. Back To Top    #19
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: 7/12/16.Spots No noticeable change

    10-12 is good. Let FC drop back to 9-10 periodically so you can check PH.
    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

Posting Permissions

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