they need to be fed in order to grow or to make them last. otherwise, they usually don't make it past a year mark. if this is your first coral, you should take it back to the store and exchange it with a easy to keep coral imo. mushroom, zoanthids, gsp, xenia, toadstools, etc are all easy to keep and even some lps like hammer, torch, frogspawn, etc are not hard to keep ime.