I'm glad to have finally found with this size an inexpensive and high-quality aquarium decoration! In my aquarium (400L) go the decorative objects unfortunately always something under me and are partly genuine too expensive, but that they in principle nothing can and around ponds only in the water! I just about ever been upset and thought to myself -> make best itself, but also can cost a lot of money and takes a lot of time and above all can! But otherwise in this cave formation. The holes are quite large so they offer good hiding places for midsize fish and visually hermachen much in the aquarium!