I know that getting oxygen to the nitrifying bacteria is good. It is why a wet/dry filter is so effective. I don't have the $ to invest in oxygen tanks to feed into the tank like Tom Barr. However, I've been considering using an air bubbler and feeding the air into the intake of my canister filter. I would use a valve to reduce the air flow so that it doesn't harm the motor or make my tank look like sprite from all of the bubbles. Thoughts?