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Thread: New Owner, CDX (PHMB) to BBB Conversion

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    Default Re: New Owner, CDX (PHMB) to BBB Conversion

    If you like, you can follow the pattern the Super Simple recipe => http://pool9.net/ssr/ for about 2 months. After that point, you'll need to switch to more conventional treatment.

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    Default Re: New Owner, CDX (PHMB) to BBB Conversion

    Ok, all of the suggestions have been enacted. I kept the pool at shock level one more night, then changed the sand, then added cya. So what should I do for maintenance? FC levels should stay around 3ppm after the CYA reaches 30ppm right? Is that all I need to check? And of course remove leaves and debris regularly...is there a good maintenance thread?
    14k gal 24' AG pool; Doughboy AquaView sand filter, Pentair Dynamo pump, K2006. PF=9

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    Default Re: New Owner, CDX (PHMB) to BBB Conversion

    Congratulations on a successful conversion!

    How much CYA did you add? Maintenance is easy but I think you'll want your CYA higher than 30 -- probably more like 50. Wait until yours has had a chance to dissolve (around a week), retest and decide if you want to add more.

    The routine will be test your pool in the evening and then add enough bleach to get back to the maximum needed based on your CYA level. The goal is to always keep your chlorine in the proper range without dipping below the minimum before the following evening. For more info about the connection between CYA and chlorine, read here: http://pool9.net/cl-cya/ (Until your CYA has a chance to build up, you may find that you need to add bleach a couple of times per day to keep it from dipping too low. You don't want algae!)

    In your pool, (which I think is probably more like 13,500 gallons), each quart of 8.25% bleach will add about 1.5ppm of chlorine. Each of the 121-oz. jugs will add about 5.8ppm. Use those as references to help you figure out doses each evening. A bleach calculator that may be helpful is here: http://pool9.net/bleach-calc/ It actually has more calculators in the drop down menu in the upper left corner.

    Keep your pH between 7.2-7.8.

    Hope this helps. If you have more questions, we'll be here!

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