Ive had one like that, i got 6 wc rays from peru, and the ammonia was sooo high in the bags that i just had to drop them straight into the tank, the tank was perfectley cycled, every parameter was perfect, but it died, it didnt die that day,it died a month later, but refused to eat and just died slowly..Im sorry to say but when that happen, i think he has tipped over.. But best of luck!!