I was just 4-wheeling when I fould this peace of drift wood in the creek. I would like to know if its possible to clean it off and sink it in my fish tank. also are those PVC caves a good idea when you have all kinds of barbs? oh ya and if I was to get a new tank what would be a good size to go to (my tank now is 10 gallons). In the tank I would like to have a bubble wall in the back would that be hard to do? ??? ??? ???