Hi guys, just wondering if it's normal to have constantly low nitrates? The tank in question is my 72 which currently houses 5 discus, ornate bichir, synocat, tiger loach and a handful of barbs and otos. Now i do fairly frequent water changes as these guys eat a lot, but i have never seen the nitrate over 5ppm, it hardly registers. I have two different brand tests for nitrate and they're identical. And it never changes, right before a water change, 5ppm, after, 5ppm. I remember when i cycled the tank, ammonia spike, nitrite spike, nitrate 5ppm. The tank is fairly heavily planted but can that seriously be the reason its always so stable?
