I got these about a month ago and I thought they died in my tank for two week without openings. So I try to bring them back to life by putting them in my friend tank for another week, they still didn't open up. So I took the rock back and threw it in my tank for more LR. Thinking that it was done for. The weird thing was today I look at the rock they came out and alive after a month of hiding. But they are pink now when I got them they were green. That is weird stuff.. Have any one experience this?