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Bells and diffusing CO2
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encipher
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Joined: 16 Aug 2004

PostPosted: 2005.01.10(Mon)15:39    Post subject: Bells and diffusing CO2 Reply with quote

Okay, I have the barest of ideas of the concept of a DIY co2 injector, which is fine because I'm not particularly interested in pearling, I'd just like to keep a nice, planted tank.

Since I've read that airstones are poor choices and letting the co2 be spliced up by your impeller isn't great either, I was wondering about bells.

Would half a coconut shell work? How would I rig it? Where in the tank should it be placed?

I'm trying to get this tank set up before I have to go back to school next week. Imput appreciated! Wink
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naclh2ofly
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Joined: 07 Jun 2003
Location: MD's Eastern Shore, USA

PostPosted: 2005.01.10(Mon)20:48    Post subject: Reply with quote

I am getting ~24ppm CO2 running it into the intake of my HOB... what is not so great about that ;^)

Fred
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Darkblade48
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Joined: 21 Jun 2004
Location: Toronto, Ontario. Canada

PostPosted: 2005.01.10(Mon)22:18    Post subject: Reply with quote

naclh2ofly wrote:
I am getting ~24ppm CO2 running it into the intake of my HOB... what is not so great about that ;^)

Fred


encipher, if you are using a HOB filter, then feeding the CO2 into the filter and letting the bubbles get smashed up by the impeller is okay. However, I would not recommend this for some canister filters, as they have been known to get too much gas, and then can stall out, because there is too much gas in the filter.
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dan
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Joined: 16 Feb 2003

PostPosted: 2005.01.11(Tue)16:45    Post subject: Reply with quote

I use a glass diffuser, its like an airstone but the bubbles are half the size or smalle.r I then put the diffuser at the bottom of the tank and under the flow of my hob filter which helps push the mist of bubbles back down. Its not totally 100% efficient but does work very well. If you watch the bubbles rise they get smaller and smaller as they get toward the top and are almost completely dissolved by the time they reach the surface. I tried running it into my hob filter and it was really annoying listening to the impeller smashing up the bubbles.
Oh yeah they sell for about $20. mine have been going a couple years now
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Beau Considine
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Joined: 03 Feb 2005

PostPosted: 2005.02.03(Thu)11:04    Post subject: One more option Reply with quote

I, like many others, do not like the sound of the big bubbles going thru the impeler, so I didn't want to run the line directly into the tube. Also, I thought a $20 reactor was not in keeping with the spirit of the coke bottle and yeast design, although I was tempted by the idea. Now I used suction cups to position my air stone just below the intake of the tube. As a result, a large percentage of the smaller bubbles get sucked right up. The sound they make going though the impeller is much more acceptable. just a faint gurgle. As with the rest of this low tech solution, it aint perfect, but it works for me.
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