Thanks for the reply. It's a well established 36 gallon bow front. Heavily planted with red metallic crypts and dwarf sag. About 20 ember tetras and a school of salt and pepper Cory's. Parameters are good no ammonia pH neutral. I have several other tanks that get dosed with ez green with no problem. Just encountered this problem with the smaller tetras. They are about two years old. The only other change i can think of is I began to feed the extreme krill flake. Maybe to much protein? Idk
I have used ez green for a while now and I love it. But recently I noticed after a water change and dosing ez green. An ember tetra began to breathe heavily and passed later on. I didn't think much about it. But after a few weeks I repeated the process and another ember tetra began to show the same symptoms. Also passed away. Has anyone had this problem? Thank you