Very informative, that’s pretty much what happened. Went to petco by my work, I asked for 10 and went to pay for them and waited for the girl to meet me at the register. She came with 18 neons in one bag, I’m still a newb so I didn’t know if this was common practice 🤷🏻♂️. 45 min drive home, then straight to my tank to acclimate in theyre bag, 30 min later I let them out and they seemed fine. Shortly after I noticed one swimming alone, he died an hour later. My wife just checked and confirmed she sees 2 more dead fish, and said she saw another swimming alone, said the others were swimming strong together in a school and hiding less. So idk if it’s ich, stress, the neon tetra disease.
My water had very low Nitrite .25ppm and no ammonia and 5ppm Nitrate, been dosing my tank with Prime and Stability daily. I have a airstone going into a sponge filter and a HOB AQ filter. I’ll post a pic