"Pearl" passed on today. One minute she was fine (at least she seemed fine) the next minute she was dead.
I tested the water moments after I found her.
Temp: 78.4
Salinity: 1.027 (Could that 1 point have killed her and how could it have gone up?)
Nitrite: 0
Nitrate: 2.5 (I'm assuming that this mini spike was due to the pellet food that she was not eating and her own death)
Phosphate: 0
Did I do something wrong? Could the salinity going up that 1 point be what killed her? This is our first fish and I want to make sure that if it really was our fault that we don't repeat the same mistake again! While I did not see her eat any food that I was giving her and I wasn't overfeeding, I did see her eating critters off the glass. Also I only had her for a couple of days so I don't think it is possible that she starved to death. She also did not have a sunken look about her.
I'm at a loss here!!