Hi all, ive now got these things together for my 100 gal tank im setting up for discus. 2kg co2 fire extinguisher, co2 tubing, co2 regulator with solenoid, bubble counter, glass diffuser and non return valve. All bought seperately from e-bay and mostly came from asia, all im waiting on now is an asia to europe plug adaptor for the solenoid and i think im ready to rock and roll. Am i missing anything? Wish me luck on setting this up i hope it works!