I also have such snot. ppm also increases. And ph rides too. But I have DWC. I change the solution completely, because I had trouble with leaves when I just stupidly added the solution, and a week later I found a lack of calcium and potassium. And plants braked. I'll increase flowering on one more week. I thought plant just can't eat all nutrients, and oiliness appeares. Also I wonder what it is. It can be infection. I didn't thoroughly wash the tank, I just drained and rinsed under pressure.
like