Thanks for the response. Normally I am a DIY guy, but I am just too busy right now to take the time to build a solution for myself at the moment. Could you explain to me why something like this wouldn't work fine? [Ebay Link Removed] Diffuser Precision CO2 Bazooka Atomizer 80mm max 110 Gallon or 420L | eBay[/url]
Having previously used diffusers and now using a reactor, the advantages of a reactor are as follows -
A diffuser puts out that mist of bubbles, which in some cases can be very unsightly. With a reactor, once it's dialed in, it will not create any mist of bubbles in the tank.
A diffuser required a much higher CO2 pressure for it to work.
A diffuser can also clog over time and usually can't be easily cleaned. It's almost impossible to clog a reactor, but if you do it's easily cleaned.
A reactor can dissolve a much larger amount of CO2 into the water.
Cost for a DIY reactor is about the same as a diffuser, but from experience, I can tell you that diffusers require periodic replacement. Think of them as extremely fine air stones. Either way your still going to need the rest of the CO2 equipment.
Personally, I might consider a diffuser on smaller tanks, under 30 gal or so, if for some reason I couldn't easily install a reactor. For example, if I only had a hang on tank filter on it. However, my first choice would always be a reactor.
In a large tank, such as the 110 gal tank you have, you might require more than one diffuser.
To answer your specific question, will a diffuser work? Yes, it will work. However, a reactor will work much better, and have a lot less problems.