Hi i have a 20L tank and i keep it at 26deg C (sorry Auzzie) I have two guppies and an angelfish. One of the guppies and the angelfish has been showing signs of internal paracites, ie eating spitting out and long stringy clear poo. I ordered some jungle parasite clear and dissolved the right amount before adding it to the tank (figured it treat the whole tank as two out for three of them have symptoms) and when i put the dissolved medication in the angel started twitching and all fins clamped like i have never seen before. Is this normal????? I did a 50% water change cos i didn't like his reaction to the meds. Has this happened to anyone else??