Biopellets took about 6 months to notice full results and im able to feed my tank frozen 2 times a day plus pellets and still register 0-2ppm for nitrates. I know when my tank is too clean because I loose color. Patience is key. Red sea offers a nice way to control your chemistry but you have to let it work. You got good advice here so I don't think I can add anything else except good luck and give the product you use "time" to work and let your system adapt to it before switching to another.