I lost my 2 greediest eaters this year, both subsequent to FD krill treats. both stole more than their fair share away from tankmates. I did not hydrate it before feeding.
One large tapajos redhead female quickly developed a swollen gut after eating, but progressed into a slow demise which took many days. at final point being pine-cone dropsy, I euthanized her.
My 2nd fish, male A. heckelii, died within hours of stuffing himself & was the absolute picture of health & vigor before that.
I now believe FD krill is not good for exceptionally gluttonous fish, unless first rehydrated. Plz note, this was not his first feeding of the day & he shouldn't have been super hungry. this was only intended as a tank "snack".
Member notho2000 did tell me that that heckelii are known to experience sudden death. all I know is mine went into his spiral after greedily eating the krill & getting an expression of "OH NO" on his face, with no other stressors before. Before failing, he appeared to have some minor difficulty swallowing... maybe just too full?
^for whatever it's worth to you.