Since I was starting to get the hang of what I had in my tank I thought I'd try a new frag and got a Kenya tree. It's been in the tank for about a week now and three of the four branches are shriveled up and lying on the rock while the fourth branch is standing up with polyps open swaying in the current. About two weeks prior to that my one and only mushroom polyp sucked itself in itself and hasn't opened up since. I have no detectable ammonia, nitrite or nitrate and my cal is 450 and alk at 12. If anyone has any ideas or suggestions I would greatly appreciate it.