Most aro keepers keep their tanks bare so that their multi-thousand dollar fish doesn't get hurt on decorations if it gets spooked. I have a red aro (only 10") in a 270g tank with one large piece of driftwood and he gets scale damage sometimes (just one scale at a time and he heals fast). My green aro is in a planted tank with lots of driftwood and he is constantly getting scraped. I might have to take out some of the wood.