I Have a 55 gallon tank with african cichlids they are all about two inches long. I also have a small pleco in the tank thats about three to four inches. Iv had the tank up and running for about a month and its decently established. The ammonia levels are as low as the meter goes and its not dirty at all. I HAD six cichlids in it and they all got along fine but i looked in tonight to feed them and one of them was dead. The only sign it showed was not eating last night other than that it was fine. Im assuming the pleco ate most of it after it died because it had no skin left on it. Do any of you have an idea why this happened or what lead to its death?