Slate can be used For Tortoise, Aquariums and Vivariums, which give a great, Natural feel and look to any set up. Great for Tortoise Setups, Reptile Claws & Beaks as well as feeding points. Can be any size or style with Cut outs for Pipes etc where needed. They are very Low maintenance, Slate is inert, will not affect any water parameters. Slate is a Natural stone which will not discolour and is untreated - Unlike plastics. The don't Harbour bacteria (Do need to be removed and cleaned as part of a cleaning routine) . Unlike Gravel and Sand they are great for grip for reptiles Claws and Beaks. A retaining wall or raised section can be incorporated in to your plans.