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  1. #1
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    Default Should I adjust these numbers for fiberglass

    After a little algae problem, these are my current numbers. I'm specifically wondering about the TA and CH.

    FC .6 (just added 96 oz of bleach)
    CC .2 (can't seem to get this to 0)
    TA 90
    CH 290
    CYA 35-40 (I have a hard time being exact with that black dot)

    Should I make some adjustments?

    18,000 Fiberglass

    Thanks.

  2. #2
    mbar's Avatar
    mbar is offline Lifetime Member Whizbang Spinner mbar 3 stars mbar 3 stars mbar 3 stars mbar 3 stars
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    Default Re: Should I adjust these numbers for fiberglass

    Yes, with a cya of 30 you will need to take your chlorine up to 15ppms and keep it there until all of your cc is gone, and you hold the chlorine overnight. You will keep battling algae unless you get it all out of there by being consistant with adding chlorine up to shock until it holds steady overnight. You didn't post your ph. How does the water look? I have a fiberglass pool, and these are the numbers I like to keep:

    Chlorine - at the "best guess chart" level (3 - 6)
    Ph - 7.2
    Alk - 80
    Calcium - 150
    CYA - 50

    If you have any problems with staining, then keeping your ph and alk on the low side is important, especially when shocking the water.

    Feel free to ask any other questions you may have
    Northeast PA
    16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5

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    Default Re: Should I adjust these numbers for fiberglass

    Thanks. The ph was 7.4. I guess I'll have to shock next week. (I want to use the pool this weekend. When you mention holding the chlorine overnight, do you mean absolutely? Like if I check it at 11:00 pm and it's 15.2, then it should be 15.2 at 6:00 am? Also, how do I lower the calcium? Will it affect anything else? Thanks for your help.

    Tisha

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    mbar's Avatar
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    Default Re: Should I adjust these numbers for fiberglass

    You can shock overnight - it will go down overnight, and you can even swim in the pool with the chlorine up to 15ppms with a cya of 30 (you can even swim in a pool with higher chlorine). The only thing is you may want to wear an old bathing suit in case it fades a little, mine never has when I swam in my pool with 25ppms, but the chorine won't hurt you. It is better to swim in high chlorine then in anything else that is growing in your pool The faster you get chlorine in the water, the faster it will clear up. You will need 4/1/2 gallons of 6% bleach or 4 1/2 bags of shock to get it to the porper level. I wouldn't use cal hypo, because that is going to add calcium to your water, and the only way to get rid of calcium is to do a partial drain and refill. If your water is clear when the algae is gone, then I wouldn't worry about the calcium, 290 is still in range. Yes, the way to be sure that all the algae is gone is to test after the sun goes down, and early in the morning to see if the chlorine didn't change. Also keep your filter running 24/7 and brush and backwash as needed while you have algae. Good luck
    Northeast PA
    16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5

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    Default Re: Should I adjust these numbers for fiberglass

    Thanks! You're always a great help! The cc confuses me a little bit. I thought that anything less than .5 was ok. Though I would prefer it at 0 of course! My original post may have been misleading, the low FC was from the hot sunny weather we've been having lately. The pool has been holding cl since I shocked about a week ago, but I'm not sure if it held totally.

    I am actually enjoying learning how to take care of this pool. After the algae outbreak I kind of took over from my husband who was more than happy to let me run with it. Thanks to these forums he thinks I'm a genius!

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    Default Re: Should I adjust these numbers for fiberglass

    As always, Marie gives great advice. She has a beautiful fiberglass pool. I was fortunate enough to get to see it and meet her this summer. Of course, ideally, your cc reading is 0. That is what we all shoot for, but, I say don't worry at 0.2. Many people will have a slight cc reading. If it goes over 0.5 is when I suggest shocking.

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