shouldn't he be soaking his food in Metronidazole for white stringy fecal matter? Or is Praziquantel equally effective against Hexamita or are there 2 different pathogens w/ similar symptoms?Secondary bacterial infections often follow ick outbreaks because the fishes immune system is weakened, and allows normally benign bacteria to become virulent, so some general anti-bacterial medication will be needed.
Hope this stresses the need to quarantine any new fish. All it takes is 1 pathogenic microbe to enter into the confines of a healthy aquarium..