Do you really think that fish that was missing was stuck between rocks?
Yeah, because when I feed them, they forget the pecking order and all come to the top of the tank. Once they feed, the male kenyi, currently the tank champ, chases them all back into their niches. I didn't see this guy once in a week and a half. Now, as far as how he got stuck, it's quite possible that the alpha male kenyi chased him into a tight spot. He isn't sick, there's no sign of damage beside some superficial scratches that are healing--plus when I got him out of the tank and in the
QT he was back to normal within a few hours.
Are you going to glue the pipe to the rock to ensure it can't move? Maybe I am being unimaginative, but I can't figure out how you intend for this to look?
So far, the only idea I have thought of is taking a pcv tube 2" in diameter (this should be enough I think) and cutting 6-inch pieces out of it, maybe 8 pieces total. When I pull all the rocks to rearrange them, I'll stack the rocks like normal, but place tubing inbetween the rocks. This will ensure the cichlids have their pick of hiding places. It may also allow me to remove a few of the bigger rocks. I'm not sure if I would glue endcaps to the tubes to close off the "caves" or leave them open. I'm probably doing a crappy job at explaining, when I get home after work I'll sketch something and post it.
Have you tried lace rock--it forms caves and cannot be moved by the fish.
It's a more specialized rock that is difficult to find outside the
lfs in my area, and is a bit more money than I want to spend