Ok so here's the story, I have a 29gal tank, 5 white clouds and 1 platy, and one third of the tank cover with plants. I successfully cycled the tank for 4 weeks, fish less with plants, about a month ago, since then the fish have been living happily, plants have been growing and thriving, I have been checking my water parameters weekly with an API master test kit and every week everything has been perfect, nitrites 0, ph 7.5, nitrates 10, ammonia 0, my question is, do I HAVE to do water changes? My problem with water changes is that my tap water has nitrITES regularly present in it. I researched it and it does say that there is a low level of nitrITES in the water system which is safe supposedly, I still filter my water before drinking thanks to brita, so pretty much do I have to do water changes? Why fix it if it ain't broken right? I'm assuming my filter that's been in there for the past 2 months is doing its job, the plants are using the fish waste as natural ferts and converting it into good nitrates. So everything is cycling naturally. Any help? Ideas? Comments?