Jarret AEFW damage is obvious most of the time. From looking at you tank thread, the hot pink, orange, and faded blue colors are indicators of a low nutrient environment. I have gotten these colors in the past from not feeding fish, changing gfo too often, running too long of a photoperiod, and accidental temp spikes. If your corals are already stressed and STNing I would NOT dip them. You will most likely end up losing the coral. Back off on the gfo, increase feeding, and if you don't see a difference in a few weeks........ shorten photoperiod as well.
Also make sure you calibrate your refractometer and be sure your temp is accurate.