I upgraded yesterday from a 40 to a 90. Went to be every thing was good. Woke up this morning to 3 dead fish and cloudy water. To make matters worse I have jury duty. Any suggestions on what I should do when I get home?
In your shoes which I am I would remove the dead fish since you have access to them. Follow with water changes, and run small amount of carbon changing the carbon out every other day.
Best wishes....