OK. In my latest battle against team nitrates, team water change was winning, but then team nitrate started to take over despite team water change persistance and surprise punches. So, now team water change wants to know what you guys recommend, Purigen Vs denitrate? Team nitrate likes that my flow is at the slowest canister of 200 gph. Should I fill my canister with a ton of Purigen, Matrix or denitrate in the battle against nitrate? Or other products. PS. Team nitrate was harmed in this battle...