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lot of mercury in tuna. like others have said lay off it.
salinity seems fine. i wouldnt fret over it.
the bleaching is of concern. that means the symbionts didnt like it's host for whatever reason and a possible expulsion occurred.
i would first look at temperature swings. you are housing the nem in a very small tank. and without temp controls in place, id believe swings would cause the symbionts to bail on it. (zooxanthellae, symbiodinium, dinos, etc)
i will just go out on a ledge here and say it is temp swings with poor feeding choices.
my .02
salinity seems fine. i wouldnt fret over it.
the bleaching is of concern. that means the symbionts didnt like it's host for whatever reason and a possible expulsion occurred.
i would first look at temperature swings. you are housing the nem in a very small tank. and without temp controls in place, id believe swings would cause the symbionts to bail on it. (zooxanthellae, symbiodinium, dinos, etc)
i will just go out on a ledge here and say it is temp swings with poor feeding choices.
my .02

