:hammer: (*edit* if the rodi setup is proven fresh and not defective,) ok,....everybody take a deep breath here, your tank is kina young right (less than a year and a half)? lets not forget, we are not only dealing with an advanced form of chemistry, but an advanced form of biology that is not completely understood yet. In this case, Id recommend changing nothing, With regular feeding/bio load/tank volume, I would not see any excess input of silica. IMO. I would wait 4-6 months, you'd probably see a reduction in algae, and after that, I would start to look deeper into excess nutrients.