Not reallyi personally think that they would be very easy to keep.
As far as I understood from AquaJournal, Amano's main inspiration source seems to be the rocky seashores. The typical rocks are nearly black, tough, and sharp edged. At least one distinctive rock, roughly conic, is placed vertically which gives a tension to the viewer.Any input is greatly appreciated.
ADA, or just goto a rocky beach... ADA is easier cause they were pre-selected already and all the kind of rocks they are using are all with very high in detail, lines and cuts with very good characterist naturely and easily for beginner to put there hands on. It is not like the stuff you can get from home depot or using lava rocks and even garden supplies store --- unless you are going to wrap plants over/on it.Where is the best place to get the rocks for the Iwagumi Aquascapes?