IDK, if I'd go that route. I used to make beer in a 5 gallon bucket and I wouldn't trust a system like that to not make a mess if the pressure got too high. I can see those bungs blowing out at the pressure required to run some diffusers. Not to mention recharging it and cleaning it would eventually be a PITA. If you need that much CO2 just spend the money and go pressurized. In the long run it will be cheaper than sugar and your time.