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Old 02-22-2013, 05:06 PM   #11
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Hello all,

Has anyone ever tried using an air pump connected directly to a diffuser using a light dimmer switch to control the amount of air going into the diffuser? I am actually going to try it tonight. Will let you know how it works out. It would save having to make a yeast solution.
Are you suggesting just pumping air into a diffuser (glass or ceramic) instead of an airstone in order to increase CO2 in your tank, without any method to generate CO2 other than what is already in the atmosphere? If thats what you are saying, you aren't going to get any results different than just using an air pump connected to an airstone, as far as CO2 concentration is concerned.

Atmospheric CO2 concentration is approximately 0.0314%. By contrast, CO2 from a DIY setup is anywhere from 78-98% pure CO2, and compressed CO2 in a high-tech setup is 99.99% CO2.
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Old 02-23-2013, 02:16 PM   #12
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I found out that it doesn't work connecting the air pump directly to the air diffuser. I don't know a lot about how the co2 works. I was following a suggestion that someone at work made. I really didn't think it would work. Thanks a lot for the info. I need to read up on the whole co2 process. I guess will be making a DIY solution until I can afford a nice co2 system.
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Old 02-25-2013, 09:19 AM   #13
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Use active dry yeast, not "rapid rise" or "instant rise" yeast. You will have better results.
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Old 02-26-2013, 08:10 AM   #14
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Use active dry yeast, not "rapid rise" or "instant rise" yeast. You will have better results.
Thank you phin. I will do that. Just set my DIY system back up last night. I am using the glass diffuser but i am having problems keeping the ceramic disk clean. I switched it out with the Red Sea reactor 500. I am hoping to get better results with this one. I will find out tonight if its working.
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Old 02-26-2013, 11:46 AM   #15
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You can't use glass diffusers with DIY, pressure only.
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Old 02-27-2013, 11:49 AM   #16
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You can use a glass diffuser with DIY co2 as long as you have a diffuser that's rated for it.
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Old 02-27-2013, 12:46 PM   #17
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Does anyone know what is the best diffuser to use with a DIY co2 setup?
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Old 02-27-2013, 01:10 PM   #18
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Inline reactor (diffuser). Works great on a canister, but really all you need is a powerhead/pump.
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Old 02-28-2013, 08:11 AM   #19
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Inline reactor (diffuser). Works great on a canister, but really all you need is a powerhead/pump.
I have a powerhead so i will try that. Thanks Phin i appreciate the info.
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Old 03-06-2013, 08:51 AM   #20
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Ok I am going pressurized co2. Tired of mixing stuff and having it turn to alcohol. What size co2 tank do you think I should get for my 125 gallon aquarium?
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