Which is better, the Smith mid-duty or the Cornelius regulator?
I'm trying to get an answer to the same question, and there is a big price difference between the two!It doesn't matter which is better. Both are much better than cheap aquarium regulators, and cost much more when new. Both are made for industrial/laboratory/commercial applications, with a much more demanding duty cycle, for customers who only buy reliable, sturdy, accurate regulators. We don't need top quality regulators for aquarium use, but the cheap aquarium regulators are a bit less than what we should demand. That's why used industrial/laboratory/commercial regulators are such a great buy - they cost about the same or less than aquarium regulators, but are of much higher quality.