From: James Purchase <jpp at inforamp_net> Date: Tue, 03 Dec 1996 23:49:35 -0500 > In George Booth's FAQ on CO2 he recommends the Dupla Reactor S and > their Bubble counter. Fine, I can get those through Pet Warehouse. I > have about 50 feet of silicone tubing and intend to also order a Dupla > check valve from Pet Warehouse when I order the Reactor. The Dupla bubble counter has a built-in check valve; you don't need another one. George