Very nice. I've considered this, though I don't really have a high tech tank (40b). I use DIY CO2 and for the longest time it was a real frustration getting the recipe dialed in but I am getting great output from 3 two liters now.
Did you completely yank all your plants or use some of the same ones? I've wondered what the reaction would be to my plants if I just stopped CO2 cold turkey, would BBA ensue until params re-adjusted, etc...