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First post for me, a year late having just noticed the date.
My Fire Eel eats almost exclusively live Freshwater Shrimps, kept in a separate cold tank (Use them for my BGK as well occasionally, now he is big enough - separate tank to Eel before anyone says it...), he will also on RARE occasions take bloodworm, redworms from the garden and turkey heart if my local stockist has no stock in which doesnt happen often. I have had him five years and he is as fit as a fiddle.
He has always got on with other fish including a Peacock Eel and a Tyre Track Eel (separate tanks now) as well as shoals of miscellaneous Barbs including my pride and joy shoal of Chequer Barbs which he lives happily with now.
The video was taken a couple of years ago (on an old mobile phone, excuse quality), the day before I moved house, there are a couple of tanks worth of fish in this as the main tanks were getting ready in the new house, yes it needed a really good clean but at the time it was sufficient while I went through the house moving palava, it is just my play tank with some barbs and a sick looking Silver Shark I was healing for a mate (I kept him he is now seven inches long and has filled out).
He is my second Fire eel, the first sadly died after (four years) getting stuck in the finger hole of the filter lid head first, I was mortified and will NEVER make that mistake again, make sure they cant get out or stuck as they will try when new in a tank or in an exploring mood.
Eventually they will eat whatever they are given when they get hungry enough (im not suggesting starving it just try different things over time), eels are scavengers, but can be fussy, dont spoil them early and they will come round. Mine takes shrimps by hand or in tweezers or if I fancy it, just let him stalk a few in peace which is as much fun to watch as hand feeding them, there is something satisfying about his goofy serpentine hunting style and the way he pops out from cover for a look around.