Overdose DIY CO2? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 08-03-2012, 09:34 PM Thread Starter
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Overdose DIY CO2?

I'm about to start DIY co2 on my 2.5 gallon betta tank, and I suddenly had a thought - with such a small volume of water, is it possible to gas my fish, or is diy co2 so weak, that any amount of bubbles/second would be safe? Any ideas or suggestions on how to safeguard against spikes in co2 production?
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post #2 of 7 (permalink) Old 08-03-2012, 09:46 PM
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depending on ur diffusion method. it could be too much
add lots of surface agitation and watch ur fish,
if they start looking stupid and lazy, or going to the surface and staying there for long periods of time. its too much take it out and adjust
adding surface agitation adds oxygen which helps leesen the effects of c02 and does burnsome c02 off

put diffusion method closer to the surface if its too much, less will dissolve that way

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post #3 of 7 (permalink) Old 08-03-2012, 10:14 PM
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Use a drop checker. It will give you a much quicker indication that something is going wrong than waiting until your fish are visibly suffering.
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post #4 of 7 (permalink) Old 08-03-2012, 11:14 PM
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Quote:
Originally Posted by TwoTacoCombo View Post
Use a drop checker. It will give you a much quicker indication that something is going wrong than waiting until your fish are visibly suffering.
Ehh it takes a little experience but
Watch ur fish respirations. If they start getting rapid, its trying hard to exhcnage c02 for oxygen.. get a stop watch and measure the gill movement per 10 seconds before c02 turns on. This will give u a baseline.
If the fish respires once per second, or 10 times in 10 seconds. Then usually 1.6 times per second or 16 times in 10 seconds is a good indicator of too much c02 or likely too little o2/oxygen

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post #5 of 7 (permalink) Old 08-04-2012, 04:34 AM
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Just a thought but aren't Bettas labyrinth fish that also have makeshift lungs as well as gills and can breathe air from the surface? It might be hard to judge if you are getting to much if all you have is a betta.

I am assuming your fish is a betta, you didn't mention what you have in the tank.
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post #6 of 7 (permalink) Old 08-04-2012, 05:26 AM
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you could also use excel.
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post #7 of 7 (permalink) Old 08-04-2012, 12:27 PM
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I've done diy co2 on my 2.5 gallon nanos for a few years now, and have never overdosed. I use a 20 oz bottle (591 ml), 1/2 cup of sugar, and 1/8 t. of yeast. I feed the co2 tubing into the filter intake. I've never seen the shrimp act the least bit stressed.


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