Is there a such thing as too much oxygen? - The Planted Tank Forum
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post #1 of 18 (permalink) Old 04-25-2013, 02:35 AM Thread Starter
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Is there a such thing as too much oxygen?

Since I have DIY CO2 that stays on overnight, I decided to hook up a supplementary air pump & bubble stone to make sure the fish have enough oxygen during the night. Even though I bought a very small air pump (5g), it makes an awful lot of bubbles! Way more than I imagined! So, is there a such thing as too much oxygen? I'm not going to poison my fish/plants with oxygen, am I?

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post #2 of 18 (permalink) Old 04-25-2013, 02:47 AM
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Quote:
Originally Posted by Smeagol View Post
Since I have DIY CO2 that stays on overnight, I decided to hook up a supplementary air pump & bubble stone to make sure the fish have enough oxygen during the night. Even though I bought a very small air pump (5g), it makes an awful lot of bubbles! Way more than I imagined! So, is there a such thing as too much oxygen? I'm not going to poison my fish/plants with oxygen, am I?
I do the same thing but my CO2 cuts on and off with the lights. I actually don't know that pumps introduce that much oxygen with bubbles as much as surface disruption and moving the water column top to bottom. To be toxic i think you would have to pump in a whole lot of pure oxygen through diffusers and even then I am not sure that would do it.
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post #3 of 18 (permalink) Old 04-25-2013, 03:43 AM
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You're not going to over oxygenate your tank. No reason to worry.

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post #4 of 18 (permalink) Old 04-25-2013, 04:49 PM
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You're also very unlikely to over-carbonate your tank with DIY.
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post #5 of 18 (permalink) Old 04-25-2013, 07:32 PM
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Re: Is there a such thing as too much oxygen?

...lol...

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post #6 of 18 (permalink) Old 04-26-2013, 02:06 AM
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you can have too much, but not fm plant production
it has to be injected by a pressurized source
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post #7 of 18 (permalink) Old 04-26-2013, 03:18 AM
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Also note that the bubbles aren't what oxygenates the tank, at least not significantly. It's the movement of the surface. If you took of whatever diffuser you are using and just used the airline, you'd have just a few huge bubbles that would create much more surface agitation. Of course, it would be very noisy, which is why only a few a few airpump-driven filters work that way (the ones at your LSF, for example)

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post #8 of 18 (permalink) Old 04-26-2013, 03:25 AM
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Most fish crave oxygen (especially saltwater fishes) so I wouldn't worry about it in the least.

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post #9 of 18 (permalink) Old 04-26-2013, 03:27 AM
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The only way oxygen would pose a threat to your fish is if there were no more water in the tank... that effectively would be too much oxygen.

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post #10 of 18 (permalink) Old 04-26-2013, 03:32 AM
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Originally Posted by acitydweller View Post
The only way oxygen would pose a threat to your fish is if there were no more water in the tank... that effectively would be too much oxygen.
Lol!!

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As cold as death;
Never thirsty, ever drinking,
All in mail never clinking.”
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post #11 of 18 (permalink) Old 04-26-2013, 04:10 AM
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The only way oxygen would pose a threat to your fish is if there were no more water in the tank... that effectively would be too much oxygen.
This made me laugh so loud, I'm afraid I scared the neighbours

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post #12 of 18 (permalink) Old 04-26-2013, 09:50 PM
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Originally Posted by acitydweller View Post
The only way oxygen would pose a threat to your fish is if there were no more water in the tank... that effectively would be too much oxygen.
too much oxygen can have the same ffect as too much carbon dioxide- death
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post #13 of 18 (permalink) Old 04-26-2013, 11:11 PM
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Quote:
Originally Posted by HD Blazingwolf View Post
too much oxygen can have the same ffect as too much carbon dioxide- death
Please explain.

I'm just curious.

I use oxygen on a regular basis for cluster headaches. I use a non-rebreath mask with my regulator set at 20-30 liters per minute (total trauma levels...). I fall asleep with it on all the time. Why don't I wake up dead?

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post #14 of 18 (permalink) Old 04-27-2013, 01:37 AM
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Too much of anything can kill you, oxygen included. You just haven't reached the concentration in your bloodstream that becomes more than your body can handle.

Similarly you can drink too much water to the point your body can no longer maintain it's electrolyte balance and your cells freak out.
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post #15 of 18 (permalink) Old 04-27-2013, 02:27 AM
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I have a horrible way of making a point sometimes.

I should have just suggested that in order to get too much O2 into your fish tank, you would need pressurized oxygen running through some kind of an diffuser at a very high level in order to put livestock in jeopardy. Much like we introduce co2 into the aquarium.

Any air stone just isn't going to do it.

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