I had the same issue and I just started feeding more. Now I feed too much as I see my phos and nitrates coming up and will be cutting back on the feedings. Since the levels have become detectable my corals look great. I do run bio-pellets though so I need to feed heavily. Not just as heavy as I have been!
Good luck dude. I was down your way a few weeks back and completely forgot you were in the area where I was at for work. Next time I come down that way I'll be sure to hit you up!
Good deal!! Look forward to seeing ya. Good luck with your feedings too, I know my tangs ain't gonna like it once I have to reduce it,lol.
Country Boy using tapatalk on his EVO



