Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: Yet another convertee asking for assistance

  1. Back To Top    #1

    Join Date
    Oct 2007
    Location
    Asheville, NC
    Posts
    43

    Yet another convertee asking for assistance

    I opened my pool on Saturday and started the conversion process Saturday evening. By Monday evening my water was looking great. I tested my water this morning and had the following results:

    FC - 19 ppm
    CC - 4.5 ppm
    Ph - 7.5
    TA - 130
    CH - 220
    CYA - 0

    Although the water is beautiful looking, there is still a lot of dirt and dead slime in the pool. I do not have an automatic cleaner of any sort, so it will take a bit to get the rest of the dirt out. Because of work I can't attend to the pool as much as I did this weekend. What is the next step? I don't want to change out the sand in my filter until I have all the stuff on the bottom of the pool out. Do I continue to keep the water at high chlorine? Should I start adding CYA, or should that wait until I change out the filter sand? Thanks for your help
    1984 vintage 16x32 Doughboy vinyl AG w/deep end, Sand Filter

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    Keep the FC level around 15 by adding bleach each evening. If you can manage two checks, early and late evening that would speed things up a little. At this point adding bleach in the morning probably isn't worth it. You want to continue doing this until the FC level remains the same overnight. Once that happens you can replace the sand, and only then add CYA.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Oct 2007
    Location
    Asheville, NC
    Posts
    43
    My chlorine did hold overnight at over 15ppm. Am I correct in thinking I should vacuum out all the crud on the bottom of the pool before changing sand? I'll see if the chlorine holds tonight as well.
    1984 vintage 16x32 Doughboy vinyl AG w/deep end, Sand Filter

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    Yes, vacuuming up everything you possibly can first is a great idea.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5

    Join Date
    Oct 2007
    Location
    Asheville, NC
    Posts
    43
    Quick update. The chlorine has been holding and I got most of the gunk vacuumed up. We changed the sand in the filter. Was that old sand full of nasty clumps of gunk! Put 3 lbs of CYA in the pool and am letting the chlorine levels decrease. My CC is zero. This really was much easier than I thought it would be. I think there are two reasons my conversion went well. First my biguanide level was low, since I hadn't put any in at the end of last season, and because of winter loss. Also I started the conversion on the weekend so I was able to check the chlorine level every two to three hours and keep it high all day. It is amazing how fast the chlorine can disappear. My first application was at dusk and one hour later the chlorine was all gone.

    Thanks to everybody who posts on this forum.

    Johanna
    1984 vintage 16x32 Doughboy vinyl AG w/deep end, Sand Filter

  6. Back To Top    #6

    Join Date
    Oct 2007
    Location
    Asheville, NC
    Posts
    43
    Ok tested my water this am.

    FC 6 ppm
    CC .5 ppm
    Ph 7.2
    TA 120
    CYA - didn't measure because I just added 3lb two days ago.

    I know I need to lower the TA. I read the sticky on lowering my TA. My concern is that I only have one return and no fountains, etc. I can direct the eyeball up, but what happens to my pool circulation? How long can I have the eyeball up and not have it effect the other chemicals? I may be able to use the winter cover pump to also aerate, if I can figure a way to securely attach it to the top of the ladder. Also because I am not real confident in my color matching skills I don't think I should try to lower the Ph any more. Thanks.

    Johanna
    1984 vintage 16x32 Doughboy vinyl AG w/deep end, Sand Filter

  7. Back To Top    #7
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    8,617
    I wouldn't be terribly concerned with TA of 120ppm. Probably the only issue you will have is rising pH. My TA has been over 200 most of the time since I've owned the pool. (My fill water is 480ppm TA) With a mesh winter cover to allow winter rain to replace some of the water, I've gotten mine down to 140 this year. I just adjust the pH to 7 when I have to lower it, and splashing and diving does enough aerating to take care of reducing TA a little at a time.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  8. Back To Top    #8

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    28,394
    Johanna,

    Very nice work on the conversion.

    I was just about to post what JohnT has already said!!

    To answer your question, aeration will have no effect on your other chemistry. It only adjusts Alk and pH.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  9. Back To Top    #9

    Join Date
    Oct 2007
    Location
    Asheville, NC
    Posts
    43
    Thanks guys. For some reason I thought the TA should be lower. It if won't hurt anything I will leave it alone then. I did aim my eyeball up this morning before work. I suppose a day of it splashing won't hurt!

    Johanna
    1984 vintage 16x32 Doughboy vinyl AG w/deep end, Sand Filter

Posting Permissions

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