I woke up this morning to two of my fish dead. i did not see any signs of illness on the other fish AND I had to go to work. When I came home all the rest of the fish were dead. They had developed a kind of white film on their bodies [see pictures]. The water parameters were all fine and I've never had this happen before. The ONLY new addition to this tank was an oranda from Petsmart that I added about 1 week ago and aquaponic stones from Petco for the Pothos i have growing on top. I did not see any ich marks or anything telling of disease leading up to this. The fish were eating and behaving normally.