I have a 125 gal that had a stock of 5 bluegill and one common pleco. Today i woke up and 4 of the bluegill were laying on the ground dead, and the other is sucking air at the top. I have a 2 maxijet 1200's and a Rena Filstar xP. The fish are all over a year old and have never had any problems. All the dead ones have no scales and the one who is still hanging on by a thread has lost most of his. What could be the problem. I hastily did a water change without checking paramaters, but they havn't been a problem. they would probably be off the charts anyway with 4 dead fish all nihght anyway. I did a 33% Waterchange on Tuesday and do one a week. I don't know what i did wrong. The only thing i can guess is I had a party on Holoween, and someone may have dumped beer in there with me not looking. Would that be enough to cause this. Any and all help to figure this out would be appreciated.
