the water killed the scat , it's well known now they die in fresh water
Thread is almost eight years old and pretty much long gone; not much point in resurrecting it.
Though scats tend to require brackish, I have witnessed firsthand a small school of massive green and silver scats in pure fresh with African cichlids (and no, they weren't tiger scats). Owner of the tank had apparently grown them out for many years with zero losses, despite the odd choice of fish and water. Seems as though high TDS and pH were the key to keeping them alive in fresh.
The brackish 'requirement' was always well-known, at least from what I could see in stores many years ago. Don't think it's necessarily true, but I don't think it'd be recommended to avoid salt if one doesn't know what they're doing.