It seems like people say this is impossible to run zero ammonia, zero nitirite, and zero nitrate all the time but this is how my water test constantly and I've used multiple test kits had stores do it and the test kit I used to do this test I bought only a month ago and my water param's never change ? The tanks been up and running for a solid 6 to 7 years and has never been shut Down the tanks 180 gallons and has an fx5 running it and for the last 4 months I've cut down to one 50 % water change a week and at the end of the week which today is this is still how my water test

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