if you don't mind, I have some thoughts....
can you place the heater somewhere where it is not easily seen? perhaps beside the filter inlet?
not sure how many fish you have there, but if you can get full-tank pics where the fish are visible (I know, it's easier said than done), I think that will help to see the actual size of the tank. Right now, it gives me the illusion that it is a small tank, when I know for a fact that 29's are not.