Hello everyone! Its me (again) I am having an issue with BOTH of my xenias (pulsing xenias and another kind that are more or a sarker purple)... it seems as if they are shrinking/wilting and it almost seems as if the individual fingers are being eaten? Everyday they get smaller and smaller. Everything in my tank as I test the water is PERECT... the green star polyp and brain seem to be fine as well, its just xenias! Is this normal? All my water paramters are also perfect alk and calcium perfect? I change my water once a week.. the xenias were thriving... now.. they are VERY small! anyone?