Newbie needs DIY C02 guidance - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 03-27-2006, 06:49 PM Thread Starter
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Red face Newbie needs DIY C02 guidance

Hello everyone!

This is my very first aquarium forum so please be patient with my obvious ignorance. I've read as much as possible on the C02 subject and have already created DIY C02.

My issues are this:
* The first time I attempted to use this setup, I had a PH crash and unfortunately lost several fish
* I am attempting to use it a second time but my PH continues to decrease

How does one know precisely how much C02 to inject? I'm currently using a bell type reactor.

Thanks again for all your help!

Phil
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post #2 of 5 (permalink) Old 03-27-2006, 07:10 PM
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First check the KH. That is how to avoid PH crashes. KH needs to be 3 degrees or higher, or the added CO2 can drive the PH much too low. If the KH is below 3, add ordinary bicarbonate of soda (baking soda) to raise the KH. With DIY CO2 the risk of getting too much CO2 is far less than with pressurized CO2, where end of tank dumps are possible.

Hoppy
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post #3 of 5 (permalink) Old 03-27-2006, 07:39 PM Thread Starter
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Quote:
Originally Posted by Hoppy
First check the KH. That is how to avoid PH crashes. KH needs to be 3 degrees or higher, or the added CO2 can drive the PH much too low. If the KH is below 3, add ordinary bicarbonate of soda (baking soda) to raise the KH. With DIY CO2 the risk of getting too much CO2 is far less than with pressurized CO2, where end of tank dumps are possible.
Thanks for the information Hoppy! I believe the KH is at 4. Is that still too low? What would be the optimum level?

Thanks,

Phil
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post #4 of 5 (permalink) Old 03-27-2006, 11:29 PM
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A KH of 4 is fine. There really isn't any optimum level. People grow plants with KH above 10, or down near zero (without CO2, of course).

Hoppy
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post #5 of 5 (permalink) Old 03-28-2006, 01:08 PM Thread Starter
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Quote:
Originally Posted by Hoppy
A KH of 4 is fine. There really isn't any optimum level. People grow plants with KH above 10, or down near zero (without CO2, of course).
Thanks! The KH is now at 5 and has stayed consistent in the last 12+ hours. The PH has also normalized at 6.8. I truly appreciate all the information and help.

Regards,

Phil
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