So I purchased an emerald crab Saturday to help eat up some bubble algea because I read they love it, I also got a few snails and hermits as well. Yesterday when I got home I found my blue damsel and scooter bleeny almost dead and several empty snail shells. Is this crab the culprit? My tank was absolutely fine up until this point ! Biocube 32g with snails, crabs and 3 fish my clown, cardinal and green chromis are fine as of this morning the scooter passed last night