These Cichlid stones are hollow and are made out of ceramic. These look like real rocks and with a hole in them they provide a excellent spawning area for your cichlids. You also will not loose water volume because they fill with water. Much lighter that traditional rock as well. These look so real you will think they are.
15-Pack Kit (Two small #6311, three small #6301, three medium #6221, three medium #6201, two medium #6211 and two large #6401) ceramic cichlid stones