I'm gonna go with my orignal assumption that it appears to be H.malu
Might be H.magnifica, I am by no means an expert on anemones, but would need a closer picture of the column or base of the anemone to ID.
Perhaps one of our ID experts can tell from those photos, but I can;t tell for sure
Also, IMO becareful about overfeeding your specimen. In the wild these things don't eat a great deal, in fact they are generally detritovores and get small infrequent meals from either their host or occasional floating by peice of debris. But they do can consume a great deal of poop
Once a week feedings are suffcient, remember these guys rely on light for energy. Don't stress it out anymore by trying to force it to eat krill or silversides.