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#1
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DIY CO2 diffuser
In my 10g tank, i use one 2L pop bottle. For the diffuser I use an upturned
cup that is about 2" in diameter, and it works just fine. I'd guess that using this setup, at least half of the CO2 bubbles out of the tank, and the rest dissolves. But, it stays at about 15ppm which is good for my needs. In my 55g tank, I have been trying to use the same method but with 2 2L pop bottles and part of a plastic 500mL milk container as the upturned cup. It has about 4 times the surface are of the other one, and again probably half of the CO2 bubbles out. But, I can only reach about 10ppm, which is too low (I'm aiming for about 20). I want to stay with a simple setup, without using a powerhead. I really can't afford one for now but I'm hoping someone else out there has built a better diffuser than me and will share thier secrets. I've tried using a piece of rigid tubing filled with marbles, gravel, and various other things to try and make tiny bubble that might dissolve better but I've had no luck. Any ideas? __ "Insert witty comment here." -John |
#2
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DIY CO2 diffuser
| In my 10g tank, i use one 2L pop bottle. For the diffuser I use an
upturned | cup that is about 2" in diameter, and it works just fine. I'd guess that | using this setup, at least half of the CO2 bubbles out of the tank, and the | rest dissolves. But, it stays at about 15ppm which is good for my needs. In | my 55g tank, I have been trying to use the same method but with 2 2L pop | bottles and part of a plastic 500mL milk container as the upturned cup. It | has about 4 times the surface are of the other one, and again probably half | of the CO2 bubbles out. But, I can only reach about 10ppm, which is too low | (I'm aiming for about 20). I want to stay with a simple setup, without using | a powerhead. I really can't afford one for now but I'm hoping someone else | out there has built a better diffuser than me and will share thier secrets. | I've tried using a piece of rigid tubing filled with marbles, gravel, and | various other things to try and make tiny bubble that might dissolve better | but I've had no luck. Any ideas? | | __ | "Insert witty comment here." | -John If I read your post correctly, I only have one word.... Airstone....a smaller airstone could make smaller bubbles, allowing the smaller bubbles to disolve into the water better.... If I've mislead you, I apologize, but it's Friday, and I'm tired... I wanna go home.... but if I hit the nail on the head, give me a cookie, preferrable chocolate chip, double fudge, with icing in the middle... |
#3
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DIY CO2 diffuser
get the 2" rena one for the finest bubbles.
jtm -- Remove NOSPAM for email replies "350X_Rider" wrote in message hlink.net... If I read your post correctly, I only have one word.... Airstone....a smaller airstone could make smaller bubbles, allowing the smaller bubbles to disolve into the water better.... |
#4
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DIY CO2 diffuser
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#5
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DIY CO2 diffuser
"Cannibul" wrote in message
... On Fri, 25 Oct 2002 17:19:54 GMT, (redled) wrote: In my 10g tank, i use one 2L pop bottle. For the diffuser I use an upturned cup that is about 2" in diameter, and it works just fine. I'd guess that using this setup, at least half of the CO2 bubbles out of the tank, and the rest dissolves. But, it stays at about 15ppm which is good for my needs. In my 55g tank, I have been trying to use the same method but with 2 2L pop bottles and part of a plastic 500mL milk container as the upturned cup. It has about 4 times the surface are of the other one, and again probably half of the CO2 bubbles out. But, I can only reach about 10ppm, which is too low (I'm aiming for about 20). I want to stay with a simple setup, without using a powerhead. I really can't afford one for now but I'm hoping someone else out there has built a better diffuser than me and will share thier secrets. I've tried using a piece of rigid tubing filled with marbles, gravel, and various other things to try and make tiny bubble that might dissolve better but I've had no luck. Any ideas? I recently installed an Aqualine CO2 reactor. You can find a picture at http://www.ab-aqualine.de/eng/index_e.htm. (Look for the CO2 section, Reactor 1000.) This works like a charm -- 100% of the CO2 dissolves. A number of people have built such a thing themselves. Basically, you need a tube with a lid and a barb both ends. Fill the tube with bio balls and plumb it into the filter outflow. (Water goes in at the top and flows out at the bottom.) The CO2 connection is at the top in this model, but the actual outlet for the CO2 is at the bottom of the reactor. (There is a small tube that runs down the length of the reactor on the inside from the CO2 connection at the top. The CO2 bubbles get trapped in between the bio balls and are trying to rise against the downward current of the water. This basically gives you indefinite contact time, allowing all of the CO2 to dissolve. The only other part of the reactor is a bleeder valve: simply a bit of pipe at the top with a tap. This allows you to bleed off air so the entire contraption can fill with water. If you are handy with bits of PVC, it shouldn't be hard to build something very similar at very low cost. Cheers, Michi. -- Michi Henning Ph: +61 4 1118-2700 Triodia Technologies http://www.triodia.com/staff/michi |
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