I decided with having memorial day and today off, I was going to undertake a new project. A CO2 Reactor! I did a decent amount of reading from what I found it appeared to me that the reactor was the best method of dissolving CO2 in the water in a fish tank. So I looked at a few post and did some googling, found the rexx griggs model, a mess of soda bottle ones, and finally the one I decided to go with, the cerges model. I found numerous post on how to build one or at least on very similar. I made a grocery list and hit lowe's up for all the parts, minus the threaded barbed CO2 insert point. I think in total it all cost me under $40 and that was with Teflon tape, glue compound, pipe cutter. I did a water test with my sink and it doesn't leak, HURRAY! if anyone has questions I can drop the links I used or whatever.