my two severums bred, at night once the fry got free swimming the other fish in the 180 started picking them off. I moved the rest of the fry to my ten gal with 2 bristle nose plecos, two small bala sharks and two cories. over night the fry vanished wondering what might have eaten them any ideas? all the fish in the tank are smaller than 2inches so dont complain about them in a 10gal