I have been trying to cure my sick fish of internal parasites. My fish have both long stringy white poop and a few have red thread things I believe are described as cammelanus worms. The Angels that have these are still eating and I have ordered a medicated food from angelsplus.com on the advice of someone here (thanks!) I cannot visibly see red strings on the rainbows, but they have long white poop and are looking terrible, and 3 of 5 are not eating. I tried Tetra parasite guard to no avail so have moved on to plain metronidazole as per recommended by local fish store. I also increased temperature and added salt to the tank. The guy at the fish store said I should not add salt while medicating the tank... Has anybody heard that as well? are they somehow contraindicated? I want to do everything possible to kill the parasites and have been told they cannot live in a salty environment. Does anybody know if white poop is a sign of cammelanus worms or might my fish have 2 different parasites?