I was checking out youtube, and came across a guy who had a heat element coming up through the bottom of his igloo cooler. I'd like to add one to my sparge tank which is the same cooler. Anyone see any issues with this? Also, what do you use typically for sealing purposes? I assume some of it will touch the beer, so it has to be non-toxic. Is silicone the typical go to? Any particular type of silicon?