So every fish in the tank has white stringy poop, I don't know what the hell is going on, I have a sentani that's breathing hard at the upper part of the tank, not gasping at the surface but breathing rapidly, I dosed prazi yesterday and lost as many have seen my Irian red yesterday morning, I have read that sometimes fish have internal parasites and that prazi can make it worse because of I don't know, should I do a big water change to lower the level of prazi in the tank? I actually underdosed it at 2 teaspoons for approx 50 gallons this is really frustrating me.