Hey Everyone. One of my cichlids, the one who usually is very calm and stays up at the top of the tank, has recently starting going crazy, He's going up and down and up and down the side of the tank, and hes going fast from one side to another... My other Cichs seem okay, but they to are acting a little different.. I did a water change today and it was a little more than 20 percent, but everything else has been normal. Anyone know why he would all the sudden start pacing like this. All my levels are great so im not sure if maybe its normal or what..