Who Gives A Fish Forums

I've bought an Eheim lily pipe from Aqua Essentials for my 2213 Classic external filter. I'm looking to improve CO2 circulation from my ceramic diffuser, as it's been a bit lacking with the spray bar. My setup circulates just over 3x the tank's capacity per hour. George, do you think that's enough ...

What's the general consensus, lily pipe or spray bar - which one comes out on top?