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Death by DIY

Discussion in 'CO2 Enrichment' started by blue_martian, Nov 5, 2010.

  1. blue_martian

    blue_martian Prolific Poster

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    Hey All,

    I'm wondering if DIY CO2 can have enough moxy to suffocate fish.
    I have a 50G with five 2 liter co2 cannisters feeding into a Tom Barr style DIY C02 diffuser where the output is on top of a Hydor 2 to really get the bubbles moving.

    I had about 8 fish die today where to only real difference in the tank is I've gone from 3 cylanders to 5. Also I didn't turn off the CO2 last night so I'm wondering if I may actually have too much CO2 from DIY.

    Thanks for any tips
     
  2. Hallen

    Hallen Guru Class Expert

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    Technically it's very possible. What signs of distress did the fish show before taking their last breath? Any gasping? - If you left the Co2 on at night and it produced a reasonable ammount of Co2 it most likely killed the fish. Doesnt take alot to do that at night, sadly I expierenced that first hand due to a broken timer.

    Another possibility is a low o2 level, which can be quite harmfull aswell, you dont tend to notice it until it's (almost) too late.

    For now I'd create some surface movement just be sure, fish health always comes first.
     
  3. blue_martian

    blue_martian Prolific Poster

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    Hi Hallen, I only saw one fish at the top, but that was after the fact so I don't know if all the dead ones were gasping b4 I got home.

    I've heard so many times that you can't get enough co2 into a 50G tank with diy I just never considered that it was possible.

    I guess on the bright side I may just start my aquascape fresh now that I have so few fish to worry about...
     
  4. Hallen

    Hallen Guru Class Expert

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    Heya :) - How are the fish doing now? During the day time with your lights on and the plants growing it's hard to gas them with Co2. During the night tho it's far more plausible since there wont be any Co2 used.

    Based on my own expierences with DIY Co2 I'd say it's hard to gas them too, but yet it's still possible.

    If the fish are doing fine again then we can asume it was Co2, if they still aren't doing good we'll look further for a possible cause of death.
     
  5. shoggoth43

    shoggoth43 Lifetime Charter Member
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    Depends on the tank cover/water level and how much CO2 you're blasting away with. If you have a tight fitting cover it's pretty easy to gas your fish with DIY. If it's an open top and the water level is fairly high, not so much. 5 generators seems as though it'd be more than enough to do so if things are too tightly sealed.

    -
    S
     
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