Hi everyone, Recently I have been having some problems with my tank. My nitrates were on the rise, they ended up getting to 40 ppm, I did constant large water changes and started using bio pellets but things just got worse. Since then I removed the bio pelltets and went back to basics. I ended up discovering that my sand bed was the cause of my nitrate problems. Slowly I removed my sand bed and after all of it was gone my nitrates have fallen to below 10ppm. I also have ...