Yea, I've felt the same way, not wanting to disturb what I've built up. It's definitely worth trying to correct, but good to have options. I'm just saying that's an option, and one that it will most certainly correct the problem, if other interventions fail.
Another thing I sometimes try in this situation is giving her a little surfactant, like some agave or similar, and see if that doesn't help liberate some of those nutrients you've got in there, making sure your water has good surface contact with the nutrients.