Help Asap!

[Salmon King]

Iguess he/s gone,I have had my eel over 3 years.I had a snowflake before himNever had a problem.One thing about eels is they need water movement because they don/t swim like fish.I feed mine octupus/squid/formula food and krill.I don/t think it was the food because they know when it/s bad.I have friends with eels .They are really hardy.Don/t give up on them.I don/t think it was a good idea putting him in the sump because it would cause more stress.It/s hard to tell what happend.I would through that food away just incase.