| | Re: Ever heard of a plenum?
There is no reason to concentrate at all on keeping nitrates low. Many people have demonstrated that 80ppm and even higher does not harm their fish. In fact, people who use high light and CO2 also dose nitrates, because they are the first nutrient to run low in that situation. Plants use nitrates, and a well planted tank cannot experience too much nitrates. We used to worry all the time about too much phosphates, but now, for some reason, we worry about nitrates. Growing plants use up both of those nutrients.
I'm just blowing off steam!