I have had my
bta for about 6 weeks for the first 5 he was fine. For the past week it has been cloased most of the time or just plain shrivelled. It seemed to be doing just fine and even in a short space of time it grew quite a bit. Now he is about a fifth the size that he was and im really concerned. The water parameters have not chance at all since i put him in there the only thing that has changed is that i have added a brain coral and a large toadstool. I have even added a pollyfilter to try to eliminate something that im not testing for. Any advice would be greatly appreciated I am worried now that it is about to die

. The foot seems to look like it has a solid hold of the rock and it has not moved from its original place for the whole 6 week period.