I have a huge green carpet I got from my dads reef and put in my Nuvo 16. When I moved it it tore a little but he was still eating fine for about a year. En a few months ago he stopped eating. His color is still good but his mouth is kinda droopy and he still won't eat, I know he is starving but why? Is he healing or maybe just not happy on the new tank. Should I risk putting him back in the reef?