I was just wondering if bubble counters need a special solution in them. Also, if you inject into the output of a filter, how do you keep water pressure to backup into the bubble counter or suction from the output to suck the fluid out and into the tank? And how does it work? I just ordered my setup tonight, and kind of understand how this one would work, as it's output just goes to a glass diffuser in the tank, but if you decide to hook it up to the output of a filter or a powerhead, how do you keep it from either water going into the co2
line or the suction from pulling the fluid out into the co2
line and too the tank.