It wouldn't of been my first idea, but now I'm tempted to try.
yea if you take your time an do it right can come out reallll nice an u get get creatvie connection different shapes an sizes... u can get the same gravel as your tank or different... big littler whatever.. if u cover an peice of pvc an take your time itll look like a real rock cave. the lady at the fish store by me told me i should make an sell them but i said it seems to simple to sell didnt think they would sell.











