help! recent deaths in my tank, need insight!

[beckysamotis]

Recently all of my astrea snails, my urchins, conchs, and carpet anenome, and emerald crabs all died. My royal gramma, peppermint shrimp, coral branded shrimp, and hermits all survived, and are all that is left in my 55 gal. tank w/ sump. Please help what my have caused this??? Thanks!

 

[hondo]

need some more info. Test the water and post the results as maybe you have a nitrate, amonia or nitrite spike. what is your current lighting as that may account for why the carpet died as they need intense light.