Well I purchased the Surf4 back in Mid January so its been running for a couple of months now. It took a good month to start getting some decent growth but now I am really starting to see growth accelerate. I am attaching a pic of what I pulled out of it yesterday. My question is, when will I start seeing reduction in nitrates? Currently my tank is sitting between 30-40 ppm and my phospate is good at 0.05.