I recently purchased an automated pressurized CO2 setup from a friend of mine. I know that he bought it from aquacave.com back in February and it came with the 5lb tank, AM 1000 reactor, regulator w/ bc, and Milwaukee pH controller. While I'm still working on fine-tuning my controller and bps, it pretty much takes care of itself. You will always have to check your water chemistry, but as far as injecting CO2 this is about as low of a maintenance setup as you can ask for. This is just my opinion and based on my experience so take it for what it's worth. Good luck and just a warning, planted tanks are an addiction!