I purchased gsp about 4”x4” matt today. The person had it stuck to the back glass. I forgot to ask but what is the best way to attach the Matt to the back wall.
IME super glue gel doesn't really stick too good to the clean glass, but once Coralline algae starts to grow and you have a spot stick it to that. Basically it's something to grab onto as oppose to the smooth glass. (an abrasive surface) GL.