Tired of you plain old boring bathtub? Check out this tutorial from Lovely crafty home of how to make the face of the tub spectacular with airstone. I really love this look and she says it is really easy to do. I may try it on mine because my tub is really old and could definitely use a new face.
http://lovelycraftyhome.com/2013/01/28/update-your-boring-builder-bathtub-with-airstone/