well even tho he went with spray paint thats great thats what i did however if you have your system up and running and dont want to tear it down to spray paint it you can use those pre print vinyl ones and get some petro. jelly and use a credit card to adhear it to the back of your tank then that solves the salt creep etc issues other than that i used glass acrylic paint from hobby lobby a dowel rod and a little roller to paint the back of mine