Has anyone ever heard of different fish becoming emaciated? It happened to my catfish, I quaranteened him but he never recovered. Then my algea eater did the same. Now one of my neon tetras looks skinny & has bad colors. I've looked in every resource I can find with no results whatsoever. I did discover some very tiny organisms in the water. Dark, very small (under 1/16 of an inch) and darting about quickly. Do I have some sort of parasite in the water? And where can I get help if that is the case?