I was referred to you as a CO2 legend. I'm setting up a new 90 gallon planted tank. I will be buying an Alan Le regulator. Not sure whether I should use an inline diffuser, people seemed to be pointed me to reactors. Alan said he uses a Sera Flore 500. REading about it, some people recommend Ista Max. What would you recommend. THis is for a bedroom set up, so it can't be noisy.