Update on my pink snot battle:
I dosed with chemi clean (did water change as suggested). It didn't seem to do a lot, and I was planning a second round, but didn't want to do it right after the first. During treatment, I pulled the cup off the skimmer and just let it overflow in the sump, since our skimmers are our best way to put oxygen in the water. I had to do several things to manually remove this stuff, repeatedly, about 3 times a day:
1) Turn off return pump and leave skimmer on so it could suck up what I stirred up in the sump, then empty skimmer. I made sure to wipe the body inside with a toothbrush to break free any chunks there.
2) Turned my MP40's onto 100% for a while to stir the stuff up in the tank and wash it into my sock filters.
3) Scoop clumps from the sock filter, which I changed every 1-2 days. I have 3ft sock filters and they were clogging up and overflowing in about 3-4 days, due to this slime.
After doing this for several days, and taking mental note of the comments about NOPOX, I began thinking there was a clear correlation. I was considering reducing my nopox....but in this process, my dosing container went dry and I just decided not to refill it yet. The slime began to reduce drastically, very fast. For the first time, today, I went to check my sock filter and there was no pink slime in it at all. I still have a few small strings here and there, but no big outbreak.
For added security, I plan to give it another week and I will dose chemiclean again.