Tank self cycled?
I recently moved across the country, taking all of my old substrate and plants from my 55 with me. When I got here, I set up a 75 with the old plants and substrate. I never dosed ammonia (which is what I normally did to cycle the tank) and have never read ammonia or nitrites. However, I am reading a slowly rising level of nitrates. Is the only way to get nitrates through the nitrogen cycle?