Jan 21, 2013 #1 jhawk__ Aquarium Advice Addict Joined Jan 12, 2013 Messages 1,121 At what level of ppm does ammonia start to become deadly to fish ?
Jan 21, 2013 #2 B blert Aquarium Advice Addict Joined Sep 4, 2011 Messages 2,706 Location Florida http://www.aquariumadvice.com/forums/f12/your-guide-to-ammonia-toxicity-159994.html