High Altitude and CO2 - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 02-06-2006, 06:04 PM Thread Starter
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High Altitude and CO2

I haven't seen this mentioned elsewhere so wanted to know if any of the experience people here have seen anything on this.

I live at 7,000 plus feet. This leads to very different atmospheric pressure which leads to very different O2 and CO2 levels in water than would be achieved at sea level by simple diffusion.

The problem will be that it will be more difficult to attain the "ideal" CO2 ppm at this altitude, and CO2 may have negative effects on fish at lower levels than at sea level, given the CO2/O2 exchange mechanisms.

I have noticed that CO2 levels in the "ideal" range seem to be stressing my Discus fish. They lose their appetite and seem more "listless" at this level of CO2 than when it is slightly less than "ideal" (according the chart in this section).

The thoughts and experiences of those keeping planted tanks at high altitudes would be appreciated.
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post #2 of 6 (permalink) Old 02-06-2006, 07:03 PM
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I am becoming very convinced that watching your fish and plants is the way to determine the correct CO2 level. If your Discus show distress when you increase CO2, just back down a bit until the distress isn't apparent. Your experience is the most important, by far. This is especially true when you consider that for real world water the CO2/PH/KH tables are not very accurate.

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post #3 of 6 (permalink) Old 02-06-2006, 07:11 PM
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Im not as high as you ( think some were around the <6,000 ft mark)...
you right about the atmospheric pressure.. have to keep co2 a little lower than ideal levels....let plants and fish judge what levels to keep co2,.


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Last edited by aquamoon; 02-09-2006 at 06:05 PM.
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post #4 of 6 (permalink) Old 02-08-2006, 03:49 PM
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My friend lives in Denver, so roughly 5,200 feet. He has no issues keepign his CO2 at 40ppm and his fish do fine.
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post #5 of 6 (permalink) Old 02-08-2006, 06:41 PM Thread Starter
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I suspect that 5000 feet is about the line where effects begin to be noticed. I work in Salt Lake at 5200 feet, and there is quite a difference in air pressure between there and where I live in Park City at 7000 feet.

Cooking in Salt Lake is not nearly as affected as cooking in Park City, for example.
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post #6 of 6 (permalink) Old 02-09-2006, 04:27 PM
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I live up at 9600ft in colorado and the lfs near here recomended an extra bubbler to keep the O2 up. (Though I am not sure how much this affects CO2 as I have never dosed before.)

Something so expensive and addictive HAS to be illegal. I'm just waiting for the police to break down my door and confinscate my fish food.
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