I know this is an old thread but I am actually doing searches on this. I have an orange lithophyllon (sp?) I placed about an inch from my very healthy candy cane and now half the candy cane (the half nearest the litho) won’t open and I think I see some white flesh on one of the stalks. I understand the litho is a type of chalice? Anyway, I seperated them further by about another inch or more and wondering if that would be enough or if these things need much more room? As an aside I moved the litho closer to the candy cane because one of my acan lords really did a number to a section of the litho. Now that they are apart the litho is much happier but as I said, the candy cane seems to be paying the price.