snowflake eel death

This freak accident happened to me a long time ago. One night I was topping off my tank with new water; the snowflake eel I had was sitting on one of the rocks, and I did see the new water being converted around him, before this night, the eel was just fine when I topped off the tank in the past...

This freak accident happened to me a long time ago. One night I was topping off my tank with new water; the snowflake eel I had was sitting on one of the rocks, and I did see the new water being converted around him, before this night, the eel was just fine when I topped off the tank in the past...

So i bought a snowflake eel on Friday looking good exploring the tank and so on then woke up today and saw his tail tried to feed him for the first time by putting a tiny bit of prawn near him and i was wondering why it doesnt wanna eat next thing I touch the tail slightly no movement then pick...