I do just have it fit to size, but I don't have any fish in this tank, just inverts. If I were to use it in a tank with fish, I would secure it firmly to ensure that a fish could not get trapped behind it. I have both sides of my tank done this way. If you google moss wall,t here are tons of pics and how-to threads. I just did it this way because the mesh was less than 2 bucks, and I had clear craft line (for necklaces for kids) here. So far I am pretty pleased and its working out well.
cool! thanks for the feedback. I think I'm sold on the moss wall...gonna give it a try, as soon as I'm done with finals :wall: