okay, so i need help please... a few days ago, i came home from work to see one of my neons by himself, not with the group, with his mouth stuck open and breathing very rapidly. they had all been fine earlier that day, before i left for work. he was rejoining the group occasionally, but mostly sitting by himself. i went to bed, and when i woke up the next morning, he was dead. this was, i believe, two days ago [the dead day, not the sick day. sick day would have been three days ago]. i figured something happened to him that was not an illness, perhaps got something stuck in his throat [though what it would have been if it was that i'm not sure. no gravel in the tank, i use sand, and the food is flakes and i break it down a little so it's easier to eat. he would have had to have eaten something off a plant]. so today i just got home from work, look in my tank, count my neons, and notice again that one more is missing from the group. i looked around and noticed a second neon by himself, mouth stuck open and breathing rapidly. i'm guessing i'll be burying another in the morning. this can't be a coincidence. i did a google search and can't seem to find anything that might give me answers to an illness, only posts on other forums about people finding their fish dead with their mouths open; nothing useful that i've seen, at least. does anyone know anything about this? please let me know if you do.. i don't want to lose the tank..