This happened to me once. The decoration i had in my tank wasnt meant for aquaria and it leached out harmful plastic resins and killed my whole tank over the course of 5-6 days but they were feeder fish, do u notice anything black or brown on ur substrate or decor?? It sounds to me like contamination unless ur fish have signs for parasites and or desease, sounds like crappy luck but u have to figure it out!
Hang in there man, and what about stray voltage currents?
Can u post a pic of ur setup, sometimes it helps to have a pair of fresh eyes!
Hang in there man, and what about stray voltage currents?
Can u post a pic of ur setup, sometimes it helps to have a pair of fresh eyes!