I spent over a year or two frustrated in this hobby. I finally read about vodka dosing but didn't want to do anything unnatural. I instead used it as a crutch. I'd dose until things were better then stop. Every time I saw some nutrients I'd dose fir a while and they would go away. My experience leaves me respectful but dubious of too much root cause thinking. The root cause of your nutrients is your desire to keep living things in a box. Until you get nutrients to run stable and low for a long time, they're not going to settle on their own in many cases. Dose the vodka. Do it carefully and watch your tank, but do it. As long as you don't rush it and keep an eye on your livestock and your numbers, the body of experience out there is you'll be happy.