I'm slightly confused, Is this just a larger version of the cerges reactor? Don't they all have co2 starting at the top swishing around and then going down to a pipe on the bottom? Nice build by the way!
I was thinking the same thing as pianofish, how is this different other than being longer?
I'd be curious to see how much gas collects overtime at the top.
it technically is a larger version of the cerges, except it's built w/ PVC. I believe the cerges style is really just a "take a home water filtration unit like this, stick some pvc here, and drill a hole to add co2"
so that is where it is different. that is why it's a combination of the rex griggs "build it with PVC piping" and the cerges "use a home filter unit"
it's a "I had better luck with my cerges style than I have with the rex griggs style in the past, but the cerges is way too small so lets combine the ideas" kind of project. the trick was changing the rex griggs style to incorporate what makes the cerges style so awesome, the additional distance the water and co2 have to go. I toyed with the thought of coiling vinyl tubing from the top to the bottom as well.
I wouldn't be surprised if the co2 is already filling up the 4" to 2" reducer. I had a nice steady dripping leak at that join that I couldn't stop... except now it has stopped leaking.
It's working great though, and sitting in a 5g bucket to catch leaking water. I think mk II will use the cut off from the 4" pipe, which is a little less than 2' long. The current section of 4" being used is 3', giving me a total height of 4'. I'd like to shove this thing under the tank stand to get it out of the way.
I also want to give a smaller scale version a shot for my 20g. maybe going from 2" to 1/2" piping or 3" to 3/4". but I already have a cerges that works so damn well for that tank.