DIY Canister filter cum Reactor

[rudi]

Hi Guys,

I came across this neat DIY device while surfing the web.
Don't know if it has being posted before.

Cheers,

The reactor/filter hanging on the back of the tank. At the bottom is a sponge and on top of that some ceramic noodles. The CO2 enters the flow right before the gravel tube so it gets beat up by the water flow, the noodles, then through the sponge.