i just bought a spiney eel from my lfs and i put him in my tank and he just sat there, i wasnt sure if anything was wrong so i left. A few hours later i returned to find him a few inches to the left and on his side with his gills doing what gills do... I toched him with my net and he didnt move, he is very stiff. does anyone know whats wrong, i did put in copper based ich remover in a few weeks ago could that be it, or does that only hurt snails and such?