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Controlling algae in humidity trays

This is a discussion on Controlling algae in humidity trays within the General Orchid Culture forums, part of the Orchid Culture category; I grow in a south window (covered by sheer curtains, of course). My humidity trays ...

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  1. #1
    Abrielle107's Avatar
    Abrielle107 is offline Senior Member
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    Default Controlling algae in humidity trays

    I grow in a south window (covered by sheer curtains, of course). My humidity trays get cleaned out about once every 2 weeks...when algae has gone wild and is inhibiting evaporation. It's sort of gross. Is this the norm? Can I add some physan 20 or something to the water to tame it down or will the vapors harm my plants?

  2. #2
    Magnus A's Avatar
    Magnus A is offline Senior Member
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    You can ad physan 20 to inhibit growth or use RO water .

    You could also ad alot of table salt to the water to make it really salt, this make the environment bad for algae.


  3. #3
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is offline Dreaming with my eyes open...
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    A tiny bit of bleach in the humidity tray water will kill the algae too. Just don't get it or the bleach water on your furniture or clothes.


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