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Thread: New Plaster and tile --startup issues

  1. #1
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    Default New Plaster and tile --startup issues

    I live in Arizona and I just had the pool replastered (ultrapoz). Upon startup the contractor put in about 3 pucks in the skimmer and 5 in the floater.

    I have been brushing the surface at least 4 times a day and the pool is totally clear after 3 days. I did install a new Hayward DE filter.

    So yesterday I tested and the CL was over 10! So I pulled the pucks out and let the filter run again for 24 hours. Here are the numbers.:
    cl=9
    ph 7.6
    alk 190
    Cal 210 (hard water here in AZ)
    cya 50

    I have a good supply of bleach and acid, and I am totally ditching the pucks.

    It looks like I need the Cl to get closer to 3 or 4, and lower the ALK. However the plaster is less than 5 days old, does anyone have any recommendations on the action to take?

    Thanks in advance.

  2. #2
    CarlD's Avatar
    CarlD is offline SuperMod Emeritus Vortex Adjuster CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars
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    Default Re: New Plaster and tile --startup issues

    cl=9
    ph 7.6
    alk 190
    Cal 210 (hard water here in AZ)
    cya 50

    Those numbers look great, other than Alk! That's unusual for a new plaster pool.

    Normal recommended FC (free chlorine) level for CYA of 30-50 is 3 to 6 and you shock at 15, but for levels of 60-90 is 5 to 10, shocking at 20.
    So a chlorine level of 10 is fine.

    pH at 7.6 is perfect--but to lower Alk you'll need to get it down to 7.0-7.2 and aerate.

    Calcium is near the bottom of the recommended range for plaster pools--200-400, but with your Alk at 190, I wouldn't mess with it until alk is in the 90-125 range. Besides, you are WITHIN the range so you don't have to change it.

    Still, you shouldn't have any problems with your current numbers, but I'm not a plaster pool guy, and I defer to anyone who is more knowledgable there.

    But, again, I don't see any signs of trouble in your numbers--they look great!
    Carl

  3. #3
    Join Date
    Jul 2006
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    Default Re: New Plaster and tile --startup issues

    Carl,

    Thanks, for some reason I knew you would be the first to respond. I got the ph down to 7.2 today and I will aereate tonight and I will repost the numbers.

    I will repost tomorrow. Thanks again.

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