Good evening, im going to clean and change substrates in my FBT tank tonight and just had a quick question. My tank is divided in half with a piece of plexi glass, on my land side I have moss and some big flat rocks covering small aquarium rock. I want to put cocofibre but don't want the hassle of it all mixing in with the rock underneath. So my question is, if I have a piece a of new good clean window screen can I use it as divider for inbetween the rock and cocofibre.