I lost one of my peacocks today. So I am going to add some rocks for cover in the tank and start the over stocking process. So my question is what type of rocks should I buy and how can I get them to stay together so the wont fall apart and damage a fish or crack my tank. I already have to large pieces of holy rock. Here is a picture of the tank as it is right now. The large river rocks are out of the tank any other ideas.

