I was planning a raft system to to raise strawberries in and that brought an ideal to mind. Could I make another raft strictly for raising crayfish? I could add in some rocks build in cubby holes and add small clay pots for hideaways. This keeps the separate from the fish so no cohabitation problems. The water level would need to be a little higher and I believe I would work an expansion place to continue the raft. I was thinking about making this out of 6" or 8" round tubing with the top open for access. What does everyone think?