did you read my post at all? I said to belive the exact opposite of what you are told. They dont know....if they do than they dont care. 2 of those eels are full fresh water...one is full marine. So "what will happen" if you put them in fresh water...one will die. if you put them in marine...2 will die. How about you return either 1 or 2 and provide the right enviornment for your fish.