I bought 2 of the flower MR. Heaters for use in my boat. They are the kind that hook up to a small propane cylinder. I want to hook them up to a 20 lb tank. I will be running a line from the tank to near the location of the 2 heaters. I will then split them so the heaters are about 5' apart. Each heater has a gas control on it where it would hook up to a small propane cylinder. My question is about the set up of the lines and where or if I need a regulator in the system. Is the valves/regulator on the heaters good enough, or do I need to put one at the big tank with a regulator. The lines going to the heaters will have ends that will be the same as the small cylinders, so I can just screw them in. Thanks for any help you can give.