Lately my nitrites have been high around 1.0 ppm which I know is horrible but I dont know why. Seems like a few weeks ago it spiked and I can't get it back down. Whats the deal? I've had the tank up and running for about 4 months now. Its not overstocked and I'm not overfeeding. I keep up on weekly water changes and have tried adding Amquel+ which is supposed to remove nitrites. Any ideas or suggestions? Thanks for helping...im new to aquarium ownership