I believe that my tank is fully cycled, but I wonder how to bring down my nitrate levels (besides regular water changes). My current levels:
ammonia: 0 ppm
nitrite: 0 ppm
nitrate: 40 ppm
I don't think I overfeed my fish. I have a couple of live plants in there and regularly I have to scrape some 'brown' spots from the glass, which is probably algae. (I have heard that algae thrive on nitrate).
Any advice is welcome.