Roots NOT taking in nutes (ppm keeps rising)

You have more than a week by my eye. Don’t trust the ILGM schedule that says it’s gonna take 70 days or whatever. Person I’d empty that aerogarden, run pHd water ONLY for like 8-12 hours. Obviously you’ve got salt build ups if nutes are spiking. So I’d let it rinse for 8-12 hours. Then start at a 2.5 micro 2.5 gro 2.5 bloom (2.5 mL per gallon) that’s it.. (2.5 mL of cal mag if you’re using RO) PH at 5.9 - 6.0 seeing your in flower and in hydro. You want it bumped up a tad from 5.8 you would have in Veg. I’m my humble opinion having run hydro dozens of times. Anyways.. then see what happens. If things stabilize, then you can add more bloom nutes if things are in good shape. You’ve got 2 weeks left at least by my eye.