Okay, let me begin by saying this: This is not a cheap alternative. It's a bit pricey and I would only advise this if you have the extra time and/or money. Although the same thing can be done using cheaper materials, I'm a bit anal when it comes to aesthetics so I chose the more expensive road.
I had a free Saturday and decided to try it out because I was curious about this concept's efficiency.
First I got a wood diffusor and an atomiser:
The wood diffusor didn't work out because the speed at which the C02 was sent through the diffusor rendered it useless - the bubbles were too big.
First I got the Dymax reactor available in the Malaysian market:
I removed the part with the C02 inlet to connect the atomiser:
I also put a small piece of airline tubing over the atomiser inlet so that it provides a very tight fit once connected to the reactor's C02 inlet:
Then I connected the atomiser and diffusor together:
It was a nice tight fit because of the airline tubing:
Then I removed the bioballs and glued the other two
connections of the diffusor using choloroform:
The final piece of the reactor (the one with the atomiser attached) I glued with silicon glue. This aids in opening the reactor and cleaning the atomiser:
It turned out pretty well. The silicon glue holds up well against leakage:
Since the atomiser creates micro bubbles, some of the free floating micro bubbles are pushed out of the outlet and it serves exactly like Tom Barr's C02 venturi diffusor - blowing C02 all over the tank.
Thought I'd throw this out there for any comments and/or possible revisions.
Edit: Hmm, the hotlinking of pics don't work anymore?