We know that this is a stressful time when something is not right with your fish and inhabitants so the information below we will be able to narrow down the problem faster. But with that said if you do not know some of the info we have asked for it's Ok Just give us as much as you can and we will still help and that is our goal here.
Tank parameters like (please give numbers and not just post there fine)
Ammonia
Nitrates
Nitrites
Calcium
Alkalinity
PH
Salinity (Salt tank)
Temperature
Tank size
How long has the tank been set up?
Last water change and maintenance schedule
Thank you!