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How to kill Spirulina Algae? Is killing my fish...

Discussion in 'Algae in Planted Tanks' started by Peacefulplanet3, May 16, 2017 at 9:08 PM.

  1. Peacefulplanet3

    Peacefulplanet3 New Member

    May 6, 2017
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    I experimented with growing Spirulina in an aquarium of mine, as I'm experimenting with Eco-systems and aquatic life balancing, and the Spirulina is VERY prolific. It seems to be suffocation or otherwise killing the fish, both young and old. They tend to lay on the bottom gasping until they become too weak to feed any longer over a few weeks. I have Red Wag Platys.


    I have a couple types of algae but none compare to the prolific Spirulina.

    I've tried to add salt n maybe just didn't add enough, or maybe it likes it?

    Any experience with this?

    Need to save my fish for their sake.


    Sent from my SAMSUNG-SGH-I337Z using Tapatalk
  2. DutchMuch

    DutchMuch Fish Addict

    Apr 17, 2017
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    first off fill that water line up! can go up way more... Less light + usual 50% WC's
  3. StevenF

    StevenF Member

    Aug 8, 2015
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    The growth process for plants and algae requires CO2 and nutrients to creat fats and sugars. IF Algae need energy when there is little to no light they react oxygen with the fats and sugar to get the energy they need. Algae blooms in the wild often deplete the water of oxygen making it hard for the fish to breath.

    Algae also needs minerals in addition to CO2 to grow. In the process of consuming these minerals the algae (and plants) can cause PH shifts that may be harmful to fish.

    The short term solution to your problem is an air stone in the water with an air pump attached to increase oxygen levels. long term you need to reduce the amount of algae growth.

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