Sorry if it seems I'm straying off topic (from CO2 injection).
I have the hagen system in my 10, kh of 6. I ditched the premixed packets after the first one and started with the diy recipie (1/4tsp champagne yeast, 1 tsp baking soda, sugar to the level in hagen bottle, warm water). I am getting maybe 1 bubble every 5 seconds ...(around 12bpm) is there something I'm not doing correctly in the mix that might be causing the slower rate of bubble production? Maybe the baking soda? I suppose 6kh is already pretty hard water w/out a need for the bs. Or is this really about the max I can achieve out of the hagen system?
I am @ 6kh and about 7.2~7.4 ph.. not exactly where I want to be at with the CO2 levels.