http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=nitrites#1 I have a 46gal. bow front cichlid tank. there are 7 fish in the tank. We have tested the tank in the last 2 wks and have 1ppm of nitrites. We have done 2 water changes (20%, and 25%) We have also removed some of the rocks we got out of the backyard (boiled for 15 mins.) Still have 1ppm of nitrities. Everything else is normal ranges. dtoguin 2009-09-28