I got a 7-8 inch fire eel from the LFS 3 weeks ago and as far as I can tell he hasn't eaten once. I've tried HBH super soft, Hbh Shrimp pellets, Hikari Bio Pure Bloodworms, Mysis shrimp, krill, white worms, and earthworms. He sniffs food then looks around expectantly for food. It's like he doesnt even realise it's food. It's been long enough since ive seen him eat that im getting worried.