improper diet is one of the most common mistakes hobbiest make when they keep marine fish..not doing extencive research before or after purchasing any species..although reading or relying other hobbiest experiences can go along way in some (most often) new hobbiest are givin false information when it comes to dietary requirements for each indevidual species they house ..even in a lesser than adiquate water quality these fish can thrive if their imune systems are at best..proper feeding and scheduling are required to do so