My only problem with the rock is that it is too "clean". I know algae can be a big problem but I think the rock would look a lot more natural if it was green as opposed to white. This makes me wonder if the setup is relatively new or if the owner is just a very good "housekeeper". Some rocks and wood need time to age to achieve their fullest beauty. In this era of "build a tank/photograph/tear down/repeat" I wonder if we give them the time they need to age gracefully.