I was just wondering what does Nitrate burn look like on plants. My tank ALWAYS has pretty high nitrates because it comes out 60ppm out the tap and I want to know if this is my NEW issue. It seems like only my Aponogetons are affected, never seen a problem on my water sprite or swords. If I lag with a water change (wait over a week), the Apono's seem to get "burned". Look like brown spots developing all over the leaves and then the leaves just wither away. But if I keep up with the water changes (to reduce nitrates) I see no spots or anything.