I was more asking about the diagram of how things were set up, but thanks for pointing out there are better places to get equipment from.
It's my understanding that a diffuser just distributes the bubbles in the water column more efficiently whereas a reactor supersaturates and disperses the bubbles. Is that correct?
Does the meter monitor CO2 ppm or just the pH? I realize that because CO2 doesn't changed the TDS/hardness it isn't a bad pH fluctuation. It did concern me when I saw the 1 point jump in pH people wrote about associated with CO2, but now I understand it.
Let me see if I have this now:
Need:
Cylinder
Regulator
Bubble Counter
Diffuser or Reactor
Extras:
Meter
Timer