Hello All... I have a 180 gallon African Cichlid tank that is fairly heavily stocked with mostly peacocks, haps, mbunas and a few other random fish. My water parameters are all good and all the fish look good and healthy. Today, when I came home, I found both of my 3-4" Clown Loaches dead. Neither looked as if they were injured or picked on - they were just dead. All of my other fish are fine and I have other scaleless catfish that are fine as well...