I got back from work yesterday, checked nitrates .20 so they came back up to normal since my FX5 was flowing normal. Today I swapped matrix in the FX5 with the rings in my XP4 and turned to flow way down , a little more than dripping out of the spraybar. After a 50 percent WC
I retested the nitrates and they were .10 so that is my baseline. I will retest every 2 days and post results.