Spotting and curling in flower. Any thoughts?

Sorry I’m quite unfamiliar with that particular product line. Quite surprised there’s cal/mag add but that’s fantastic.

Would be nice to see ph tds going in and a run off test

Slurry is a true method as to know what’s actually in the medium

Ran a flush test with my usual tap water.
Before: ppm, 595 and ph, 8.51
After: ppm 2214 and ph, 6.38

13” from canopy to lights on 300w LED

Given the high residual ppm I assume I’m locked?

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Phosphorus? What strain blue ?

Bag seeds. Slightly assume banana kush and harlequin.

I need to do another run off test. Kind of think magnesium deficiency. May have to do a slurry test. I think 4 more weeks til harvest and monitoring trichomes for progression from clear. Really hope I didn’t hurt my harvest.

PPM results from last night seem excessive so run off pan wasn’t clean, I bet.

Yes, I’m thinking it’s potassium and manganese. Going to start feeding with each watering,now.