It's possible other contaminents from the heater poisoned the water, But I agree it was likely the arrow eating glass. electricity may not electricute fish, but I'm not sure it doesn't screw with their lateral lines.
Miguel;4736307; said:fish do not get electrocuted, since they have no contact with the ground.
it is the same with birds in electric wires.
We get eletrocuted because we have our feet on the ground and the current passes through us.
Milpool;4736623; said:Just buy an identical arowana and your buddy will never know!

actually, they do ! I haven seen a lot of people use electricity to catch fish in water ! and water in a fish tank is a good conductor !Miguel;4736307; said:fish do not get electrocuted, since they have no contact with the ground.
it is the same with birds in electric wires.
We get eletrocuted because we have our feet on the ground and the current passes through us.