Cal-Mag deficiency?

F#36

both girls showing signs of this. From what I can tell it looks like a cal-mag deficiency. Just wanted some input from the fellas. Have been watering with distilled water; FF grow big in veg, and now tiger bloom (1/2 dose). Added FF sledgehammer, 2 waterings ago and 1 spoonful of molasses per gal last watering.

Medium is FFOF

Looks like minor nutrient burn on the edges.
Not cal-mag issue from what I see. Srry...Unable to help resolve, I only know coco.

stupid question but should I skip adding any nutes for a couple waterings to flush out any excess buildup?