I bought a starfish at my lfs that has been there for many months, about a week ago. I know they need to be acclimated very slowly, which i did. 2.5 hrs. It never looked great in my tank, which can be normal for a while, but he is now halfway between the sandbed and glass with one arm flopped back over him. Looks shrively in general to me. Is there anything i can do to help this guy? Idk if hes even alive at this point. I have a 125 gal fowlr. Salinity is 1.024. Ph is 8.2, temp is 78. Nitrates and nitrites, and ammonia are non existant.