Which is why I was always keen to make the reactor as wide as possible (like the APS EF2), having the bypass did help when I was testing with the CO2 ART inline atomisers, I had also provisional planed to make my 'next' CO2 reactor as wide as possible, double the radius of reactor chamber decreases the flow by Four. @X3NiTH conical fermenter is wide - tank bulk connector on the top/screw lid ( which will be bottom when its a CO2 reactor), then just need to fit a CO2 outlet return for venturiYes at the end of the day it's all a relation between flow and gas buoyancy. I suppose I could also have no bubbles coming out of my Rex Grigg style reactor when using a diffuser but I would probably need to double the hight of the reactor OR increase the diameter OR create a bypass to slow water flow in the reactor.