The pepper idea has always been somewhat strange to me for 2 reasons. 1 is that Paprika is often mixed into freshwater fish dry food by many breeders because it is suppose to enhance color. The other is that when I use to breed discus, there use to be a certain airborn parasite that jack wattley always warned about. The way it works is that this parasite would latch on to a fish's skin an cause them to over produce slime. When the coat is thick enough, the fish would fail to be able to osmoregulate properly and slowly die. This disease wa also hard to kill of because the extreme thickness of the slime makes it so that no toxin can get to them.