lindabrooke
New Member
Hi guys! Tanks been established for years, 65 gallon freshwater. Did a ~30% water change like I do every week or so 2 days ago, dechlorinated, etc. Woke up yesterday morning to 4 dead fish, some of which that were many years old. Boyfriend tested the parameters, all were normal. Nitrites were 0, Ammonia was 0.25, Nitrates were 0, so he did another water change since all the fish were at the surface, ~40%, and the fish continued to stay at the surface. I woke up to another dead fish this morning. I'm not really sure what to do/whats going on?