I did two 50 percent water change and my Nitrates are 20 ppm. I have a 40 gallon tall tank. I moved some fish to another tank, cause the one tank I have is overstocked. I am trying to find a home for a few fish. Anyways any suggestions on how to lower the Nitrate? I do have a Nitrate pad but it maybe time for a new one, They just messed with the water where I lived, so maybe that is why. I do not have any live plants, should i buy some? I just need tips on how to lower the Nitrate in my tank.