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ph swings

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  1. #1
    EMUreef - Reefkeeper
    IT Guru

    Join Date
    May 2010
    Walled Lake, Michigan
    Awards March Madness Award - 2013 March Madness Winner Photo of the Month Fishbowl Drawing Winner

    Default ph swings

    i for the life of my have been having trouble keeping my PH stable.

    for example today i dosed my 2 part about 40 ml of alk. brough the ph to about 8.2 by the end of the day when the lights were off it was at 7.8 ish, i dosed a little more to hopefully improve the swings, went back up to about 8 ish, a couple hours later it was back down to 7.8

    yes the AC is on, but the tank is in kind of a larger room. Surface agitation. Skimmers on. Fuge on reverse lighting.
    skimmer air intake has a hose going out of the stand..

    any other ideas?

  2. #2
    bigbill - Reefkeeper CR Member
    Join Date
    Jul 2010
    warren mi
    First Name
    Awards Grow Out King - 2011 Grow Out Contest Photo of the Month MBI Participant


    i started runing my sump lights 24hours helped a lot
    I have no fear of losing my life - if I have to save a koala or a crocodile or a kangaroo or a snake, mate, I will save it.
    Steve Irwin

  3. #3
    jimsflies - Reefkeeper

    Join Date
    Aug 2009
    First Name


    pH is always lowest right before main lights come on for me. This is has to do with photosynthesis versus respiration and dissolved carbon dioxide levels (carbonic acid). Running a refugium in reverse light cycle mode can even it out some.

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