How much CO2 for 10 gal. - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 09-09-2002, 11:06 PM Thread Starter
 
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I just recently turned my 10 gal fish tank into a planted tank. I already have a 75 gal planted tank with pressurised co2 as some of you already know.
The problem I'm having is getting the diy co2 level right. Whats an apropriate bubble rate for such a small tank. Right now the bubble rate is about 1 bubble per second which is way to much. I was dissolving it thru my power filter intake and that was working well, to well, because my ph took a dive to 6.2 after about 3 hours. My kh is around 4.
For now, instead of feeding co2 into my power filter I'm just letting it bubble up to the surface so as not to overload the tank of co2. By doing that my ph has leveled off at around 6.4. But thats still too much co2. According to the chart that gives me a co2 level of 47ppm. My fish seem fine so far, no gasping. 2 guppies and 2 angels. My mixture is 2 cups sugar,1/2 teaspoon yeast, approx 2liters water in a 3 liter bottle. I heard you can slow it down with baking soda. How much? Is it trial and error? Any Ideas? Thanks:aah:
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post #2 of 2 (permalink) Old 09-10-2002, 03:02 PM
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Yes, if you raise your KH with baking soda, the pH drop will happen much more slowly. CO2 levels will still be high, but changes will happen less drastically, which will make the fish more happy.

here's some advice, though - use less yeast. I use 1/8 tsp and it takes longer to ramp up and lasts longer. Right now, with a half of a teaspoon, the yeast is having a field day and is way too prolific. Try re-mixing with only 1/8 tsp. It will take a day to get going, but will last a month.

You can read more about this here...

http://www.nfis.com/~hartland/aqua/co2.htm

- Sam P -
plantedtanker in limbo - all tanks currently in storage
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