Large tank Owners, how do you diffuse CO2? 60+ Gallons

I use a inline reactor. Similar to Rex griggs reactor.

I live on the edge at the moment I disconnected my bubble counter because it would leak if it wasnt situated perfectly. I used a drop checker with 4 kh water that tells me when I have ~30ppm.

I already have a Hydor Inline heater on my filter. I know the heater does very little, if not, nothing to the water flow, but I do want to keep the water flow high as possible. Could I possibly stick a powerhead in my tank and have the "airwood" under the powerhead intake, or stick the "airwood" under my filter intake?

inline diffuser that i made myself. it was really cheap too: 2 feet of 1.5inch diameter pvc, endcaps, and brass airline nipples. total was like 15 dollars

tropicalfish said:

I already have a Hydor Inline heater on my filter. I know the heater does very little, if not, nothing to the water flow, but I do want to keep the water flow high as possible. Could I possibly stick a powerhead in my tank and have the "airwood" under the powerhead intake, or stick the "airwood" under my filter intake?

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I've done the diffuser under the filter intake before and never had a problem. But then I saw a post that someone else did that, got too much air in the filter, and it burned out. So now I put the diffuser under the spray bar. It doesn't work very well (esp. in a 120 gallon), but I'm not looking for high CO2 levels either. You could do this with a powerhead since they're a lot cheaper than a canister filter. And if you try the limewood airstone, let me know how it works. Neither ceramic diffuser that I've owned did a good job of making really fine bubbles.

I use a limewood airstone, under the intake of my canister on my 120gal. Never had an issue yet. I'm running about 2-3 bps with no visible CO2 coming from the spraybar - unlike when I ran in into the intake of my powerhead. I don't use a drop checker for CO2 levels, but my pH usually runs 6.0 (sometimes 6.2) with a KH of 2-4.

2 inline reactors outputs on either end of the tank. I'm now running about 8 BPS (4 into each). Plants are happy, fish are doing well, BBA finally at bay.

I just set up a 150 a couple weeks ago. I built my own reactor out of 2.5" and 3" and 30" tall clear acrylic tubing. Spread out the outflow through out the lenght of the tank (60").

On my 75g I use a Rena Micro Bubbler placed inside the prefilter of a powerhead. Produces a nice CO2 mist. Pics and details here.

For my big tank I am soon to setup (240g) I plan on simply using the same (but larger) Rena Micro Bubblers placed near the return pump intake (x2), but I've not got it setup yet.

2 Rhinox 2000 diffusers run off one tank with a manifold and two needle valves. This is on a 6 foot long 125 gallon tank.