Texas Holey Rock Tunnel for your Cichid Fish General There is a nice archway

There is a nice archway and two 12″ rocks that are stackable and have big swim-through holes your fish will really enjoy

The varied sizes let you build depth

These rocks are clean and ready to use right out of the box

Heavy & Secure: Stays exactly where you place it without floating

16" Wide x 12" High

Texas Holey Rock Tunnel for your Cichid Fish General There is a nice archway30 pounds of Texas Limestone Holey Rock for your fish tank. Clean and ready to use one arrival. Weight 30 pounds. Texas Holey Rock is made up of calcium, which is necessary for fish to live, When you put Holey Rocks in your tank, you are providing a constant supply of calcium for your aquarium.