I broke down and picked up a salifert nitrate test kit and found out my trates are at 0.2. I have a 125 gal tank feed every other day 3 cubes frozen food. I have a 4 in sailfin tang, a pair of skunk clowns 2 in, 2 chaulk bass 2 in, sunburst anthias 2 1/2 in, a yellow headed sleeper goby3 in, and a manderin about 2 in. What is the sweet spot for trates? How would I up them to it or best way to do it? I runn gfo 1 cup and change every 2 weeks in a modded brs reacter. Ca is 470salifert, kh 9.3 dkh salifert, mg 1380 salifert, sg 1.026 refractometer, phosphate 0.03 hanna pocket checker. I am tring to get better color out of sps. I only get color at the tips. Any help would be great. And I run 3 250 w radiums for 7 hr a day in lumenbright mini's with reefflux cube ballasts(m80). Thanks in advance.