Too much ??
 

So i had some softies ( dont know what they are) they came with some LR i picked up but i got some fuel coral growth food , so much question is i guess can corals have to much calsium cause for about two weeks they were growing like crazy but then this week i noticed The three heads moved around on the peace of LR and then today i noticed them shriveled up and laying on the sand

Sorry i no its a perty vag description but any ideas ?