I was browsing around and came across some plans for a DIY coil denitrator. I could tell that by some of the posts people were against them. Aside from the regular salt water changes in my fish with reef tank, I'd like to keep mintrates as low as possible. If it really is as simple as some tubing and PVC, I am thinking about one but of course want input. If i take the output and feed it close to the skimmer, then the output water would be oxygenated right? What are the risks? Why don't more people use them? Just thought I would ask.