Oh I forgot, I suspect disease or parasites to be the 4th thing that shortens their life. If you feed anything saltwater they must be qt'd and the fish treated for parasites before feeding, so I only feed my predators ghosties, guppies, and mollies. Most people that bash fresh water food likely have never kept any of these predators alive for any length of time, much less years. Ghosties are my staple, I have a small tank where they are being gut loaded and vitamin enhanced. I have a lfs where I can get various sized mollies for cheap, breeding your own mollies is also an easy project. Guppies are also a good food for the small sized angler, I'll even get the fancy ones when on sale.
