I saw the blue velvet picking on the toadstool twice this morning and the four stripes actually pulled one of the flags off the rack. That's the last straw, I made a divider from an old screen door and subdived my tank into 3 sections and move the rock. I caught them . They seem to be taking the trasition well, no chasing. I also moved 2 more rocks from the display. hopefully they stay this way.