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APi algaefix - how long can open bottles be used?

Discussion in 'General Plant Topics' started by Petex, Jul 28, 2014.

  1. Petex

    Petex Member

    Jan 1, 2011
    Likes Received:
    Local Time:
    4:06 PM
    I have an opened bottle APi algaefix here. And used the stuff 1 or 2 years ago. I remember it quickly killed any hair algae (algaefix also killed all my utricularia gramminifolia in past)
    Now I have in a tank with a few hair algae and used the stuff again, but it did not kill any algae. (utricularia also looks fine)

    So it seem that it lost his algaecide power and my question is,
    how long can an opend bottle be used?
    After how much month did the stuff lost his algaecide potential?
    #1 Petex, Jul 28, 2014
    Last edited by a moderator: Jul 28, 2014

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