Aquarium supply stores sell a variety of tank decorations that enhance the habitat for your fish. Some are plastic or ceramic creations and others are simply attractive rocks and stones. By buying these tank decorations from the dealer, you are avoiding contaminating your tank with toxic substances and water chemistry-modifying agents. Avoid the temptation to collect your own rocks until you know how to identify each kind and its influence on your aquarium.
If you add rocks to your aquarium, place them so they won’t topple. Never lean rocks up against the side of the tank for support, because they can fall and injure your Betta or break the glass. Smooth, waterworn stones look natural in the aquarium; angular blocks do not. In addition, smooth stones don’t have sharp, rough edges that could hurt your fish.
One way to create a permanent and safe effect is to glue rocks together using a silicone aquarium sealer. This will keep your rock display in place if burrowing bottom dwellers begin to dig around them. Always allow the sealer to dry for several days before you place the assembly in the aquarium.
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