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Thread: Bleach..How Much is TOO much

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  1. #1
    Join Date
    Jun 2006
    Location
    Brookline, MA USA
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    98

    Default Re: Bleach..How Much is TOO much

    Quote Originally Posted by stma View Post
    Ph "was" 7.1 prior to shocking and two hours later I was reading above 8....but if anything I assumed the "pink" in the PH Indicator would have been washed out instead of getting darker....??
    Taylor's Water Chem boolket is clear about high pH false reading. See page 11 if you have it.

    The common knowledge is that a high enough FC at the proper pH should kill the green algae. Here's an example which also gives you more tips.
    Since the green is persistent, either you haven't reached the proper FC yet, or the pH for some unknown reason is too high, or you have an unusually persistent green monster.
    The easiest way is first to make sure you took care of the FC and pH. If this doesn't work I can tell you about my experience with treating "Pink Algae" with Yellow Out.
    You can read about it in this thread.

    Last season I had pink algae on the walls. The water was clear. At that time I didn't know what I know now thanks to this forum, so when shocking to 5-10 ppm didn't work I was looking for something else. (Little did I know then that I should have tried 20 ppm first, with my CYA of 60.)
    Coral Seas has a similar product that works with green algae. It's called Green to Clean.
    Check it out here.
    Yellow Out did the job, but there are a few drawbacks:

    1. You have to start with pH 8. (This was the case with Yellow Out. I'm not sure about Green to Clean.) You are having now uncertainties about your pH. This issue has to be solved.
    2. The process works by adding the Yellow Out or Green to Clean and active chlorine together. You already have a supposedly high FC.

    If the traditional shocking method doesn't work for you
    I'd call Fred as mentioned in my Pink Algae - Yellow Out post and ask for his advice. He doesn't just sell chemicals. He works in the field.
    I hope the regular chlorine routine will finally work for you.
    Last edited by Water_man; 06-04-2008 at 08:56 PM.
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