Large Texas Holey Rock tiered Safe Swim-Thru Tunnels: Provides vital

Safe Swim-Thru Tunnels: Provides vital territorial boundaries and stress-reducing hides for active or breeding fish

These have been thoroughly cleaned and are safe to put in your tank when they arrive

so if your aquarium has a healthy amount of substrate

This gravel has been screened and cleaned for your convenience

This substrate is all natural

Large Texas Holey Rock tiered Safe Swim-Thru Tunnels: Provides vitalA large Texas Holey Rock for African Cichlid, or any fish that prefers rocks with holes. It is 16" high x 13" wide. The weight is right at 40 pounds. It has large holes on all sides. Because it has a high calcium content, this rock will provide nutrients that make fish healthy.