In a smaller tub like a 28 or 32qt your temps should be good with a UTH. With a longer tub like a 41qt the two UTH with one a lower setting is a good idea. Tubs are easier to clean and you could have two on hand with the low price and just transfer your snake at cleaning time. Easier for you, less stress for your snake. With display not a consideration, tubs are ideal I think.