My background is called Oceanvisions. You apply with soapy water and i used my credit card. Goes on like tint and is very easy to apply. I even applyed it very easily with out having to remove anything off of the back of my tank. It is cheap and if you ever decided to change colors or change tanks it peels right off. Also salt creep does not affect it and there is no air bubbles between glass and background if you do it right. Looks just like paint but is not permenate. Did i mention cheap, the stuff ran me i believe it starts at 1.99 for 18 and 19inch high up to 3.99 for 30inch high per foot.