So long as you guys think it looks good, I will keep it like this for now. I like it... and my 2 new clowns seem to love it. They swim through all the caves, its cool to watch. I just didn't want people to look at it and think it is too crowded with rock. My fiance thinks it is, however, my father likes it. I think I might remove a piece or two to give a little more swim space down the road. would 4 or 5 lbs. of rock make a major difference with my biological filter?