Snake rack heat tape?

[bcr229]

a 3 to 4 inch strip running across the back is usually the standard and more than enough when it comes to a hot spot.

That would work for the 32's but the 66 quart under-bed tubs have a good amount of floor space, and a thin strip like that may not be enough if it just cuts across the short side of the tub. If it runs longways it would work.

I use 11" heat tape in my 54-qt tub rack, the pieces are cut 12" long, which makes a nice squared-up hot spot for the snake to coil on while under a hide. It works well for juvenile boas.