Nope, my CO2 bubble counter says about 3 per second, and the impeller noise supports that - about three pops a second, followed by an occasional blast. And, I still occasionally get some BBA new growths on driftwood and hardware. Before I had it this high BBA was sprouting everywhere all the time.

In less than a month I will be replacing my 29 gallon tank with a 45 gallon one, using all the same hardware, so I will see how that works. Right now I am primarily just trying to have a tank full of plants for when I make the switch over.