Deco-Replicas presents the Granite Aquarium Ornament & Hideaway 8 Piece Set (Small, Medium, and Large). These rock formations are made from sand of real granite, and is not made of plastic or resin. The texture mimics a variety of rough surfaces found in a fish’s natural environment. You may wish to consider sanding down any areas you feel are too rough for your pet. Not only do these pieces compliment the interior décor of many modern homes, they also serves as hideaways and swim-throughs for your fish. Perfect for cichlid tanks, since they’re territorial fish, and must create their own space. Easily Stackable: Our granite-like ornaments come in different sizes; this 8 piece set includes 3 Small, 3 Medium, and 2 Large. Stack or arrange these stones however you’d like within your tank. The possibilities and combinations are endless! Super Simple to Clean: Simply wipe down and rinse off ornament with warm water when you are cleaning out your tank. Never use soap, as the residual soap particles can harm your fish. It’s safe for both freshwater and saltwater aquariums. Measurements: Small (2” x 2.75” x 2.5”); Medium (3” x 5” x 4.75”); Large (3.5” x 6” x 5.5”).