I have had my frogspawn for about 5yrs, it had only 4 heads when I got it, now there are so many I can't count & it's 11inches long & about 7inches wide. It's huge, but recently the top has grown so much that the heads (I think that's what you call them?)underneath are being shaded & are starting to die off. Is this normal since they are no longer getting the light they used to? My stats are all good and all my other corals are doin awesome. Please help.....