hmmmmm. . . it seems feasible that it would help, but you would have to rig it somehow to keep a decent seal. If you have the battery operated air pumps I would think that air flow wouldn't be too much of an issue. Of course, in order to "see" what's going on in the tank you'd have to lift the blanket and lose some trapped heat, so I guess that IMHO there's a 50/50 chance it would help, on the other hand, I can't see that it would hurt either. . .