m0useanswered grow question 3 years ago If your EC is really 2.2 its way to high.
Want to lower that down to 1.2 or even 1.0 for autos
This feeding guide is great, its not 100% perfect and if your plants are showing signs of needing more or less you need to adjust.
https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/
Might need a small flush to get the EC down and back into a normal range.
Best Of Luck!