I did a search for Co2 split and 2ways in the forums but everything seems to directed @ 2 Aquariums one Co2 tank setup. What do you use when it is one tank? I was thinking of putting a second Diffuser in my 125 gallon tank. It is 6 ft. long and I read Epicfish mention that on a tank over 4 ft. 2 diffuser should be used, one on each end. I was thinking of just putting a simple plastic Y after the bubble counter. Would this suffice my needs? Any advice would be appreciated.