I do not have a propane smoker, my smoker is an old refridgerator with a hotplate in it a a solid state heatpump control. It heats up pretty slow. So I do 140 for about 8 hours and watch the fish so as not to overcook it. Good Luck!
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"The best argument against democracy is a five-minute conversation with the average voter."
Winston Churchill

"So it goes." Kurt Vonnegut jr.