Would you guys suggest adding more fish to increase nitrates and phosphates rather than dumping more food? Or KN03 Or all three

?
Currently my nitrates read around 2.5ppm, phosphates at 0.03.. I feed everyday tons of reef roids and LRS, however I stop feeding one day and my phosphates drop to undetectable.. I had to turn off my skimmer I no longer use it at this moment.. I have about 5 small chromis, 1 flame angel, two clowns, blue tang (small) yellow tang(medium) six line wrasse, sailfang tang. All in my 525xl..
I'm up for suggestions