Which of my fish Are the most sensitive to CO2

Discussion in 'General Discussions' started by carl leathwhite, Jul 9, 2020.

  1. carl leathwhite

    carl leathwhite

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    Hi I'm currently running CO2 on my 60l for the first time fish inside are
    5corydoras (mixed)
    10 Neons
    5 mountain minnows
    1 betta
    and 1 rainbow shark
    I had 6 corys and 1 mysteriously died after looking sick for a few days I was wondering which of my fish would show the first signs of dangerous co2 level I do have an indicator in my tank but as we know it takes time for it to change colour
     
    carl leathwhite, Jul 9, 2020
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  3. MariaS

    MariaS Retired Moderator

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    @carl leathwhite

    My knowledge of Co2 is limited so im not sure if your cory died from the Co2 levels however, i do know that the rainbow sharks get quite nasty and can very well be what killed your cory so keep an eye there
     
    MariaS, Jul 9, 2020
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  4. Hendre

    Hendre Polypterus freak

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    Corydoras have a secondary breathing mechanism so elevated co2 levels would probably affect other fish before the corydoras. The classic sign of co2 overdosing is fish gasping for air
     
    Hendre, Jul 9, 2020
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  5. A new day

    A new day Moderator

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    Yep it may or may not be CO2 but there are some serious question marks around compatibility and stocking levels...
    also, corys thrive in a group of 6 or more of the same species
     
    A new day, Jul 9, 2020
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    carl leathwhite

    carl leathwhite

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    Any recommendations I think I may move the rainbow shark into my larger 270L whould that make a difference
     
    carl leathwhite, Jul 11, 2020
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