What kind of (pressurized) CO2 diffuser do you use?

I use a ceramic diffuser that sits underneath a small powerhead. The microbubbles get sucked into the powerhead and then blasted into the path of my canister output. This is basically a variation on Tom Barrs mist method. So far it's got me the best CO2 levels with minimum bubble count.

glass diffuser and a Hagen ladder. Works wonders.

-John N.

I've tried Tom Barr's misting, but haven't been able to get good results. Probably my problem, not Tom's Currently trying a variation of that on another tank.

Currently using the same method as reiverix, but I've got some limewood on order and am going to try that instead of ceramic.

I have a glass on order as well, another one to try.

The two only things I really haven't tried are direct cannister injection -- and I'm not going to do that -- and a reactor.

If the limewood doesn't produce the finer bubbles that I want, then I'm going to build a reactor.

Roan

jhj said:

Roan: You mean you will be using just a limewood airstone simply connected to your CO2 line?

Does anyone else do that. Seems like a very simple method especially if it get the job done.

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That's pretty much what I'm doing now only I'm using a ceramic diffuser. So long as it doesn't clog up and the bubbles stay fine, it's pretty efficient for a simple stone.

I either set the stone under the intake, or under the outflow. Currently I have my Eheim spray bar pointed at a 45* angle downwards and the ceramic bubbler under that. Only the big bubbles get to the surface. The little tiny ones get caught in the current and are sent through the tank. THey usually get caught on the plant leaves.

I *do* have a problem getting my pH to my desired level in the morning. It takes about 3 hours, which is apparently two hours too long

Explains why I'm trying other methods. I also have a small power head on order and I'm going to doing that in conjunction with the stone or wood like reiverix does.

Roan

Roan

My power head has a hole to add O2 from the ait in the output tube and this is where I put the CO2 in. The powerhead is running a homemade canister filter made out of a house hold water canister bought at lowes. I fill the canister with bio-balls and this breaks up the co2 into very tiny bubbles that I can hardly see. The main thing in injecting co2 in your tank is making sure your water surface is kept very still. This will allow the maximum of co2 to stay in the water.

I use the Hagen bubble ladder. Not the most efficient, but still works very well. I measured CO2 at 45 ppm in my tank today. This is a 72 gallon, so don't let people tell it won't work on medium-largish tanks.

John R

I use a ceramic diffuser that sits underneath a small powerhead. The micro-bubbles get sucked into the powerhead and then blasted into the path of my canister output. This is basically a variation on Tom Barrs mist method. So far it's got me the best CO2 levels with minimum bubble count.

Click to expand...

Same principal here, with the differences being that I have my canister output at the top in order to have some surface circulation, and a little larger powerhead at the bottom. The bottom powerhead is where the micro bubbles are sucked up and blown down the back wall of the tank. I have also installed a small powerhead to blow down the front wall of the tank in order to promote good consistent circulation and misting throughout.

Jay