After 3 years they have all died. I’m not sure exactly why. I did have a water quality problem related to an exploded heater that caused high levels of heavy metals in the water. I suspect that was the major contributor as all coral and several other fish also died in about a 2-4 week time frame. They all looked fat and happy and then they died suddenly.how are the filefish doing? i'm planning on getting a pair for my new FOWLR