I had a betta before and in my experience, it didn't even come close to the output of the cricket when run on a single 5 lpm concentrator. I never ran the betta on 2 oxy cons, so I can't give a comparison in that, but if you run a cricket on 2 oxy cons you'll think your burning through a k tank...and that's not something I ever believed was possible until I saw it for myself
