Nute Deficiency NEED Opinion's......Pics inside

Strains- White Rhino & Himalayan Gold (greenhouse)
Ebb & Flow
Using 3 part GH nute system (Micro-grow-bloom)
2 days into 4th week of flowering
PH kept 5.8-6.0 got a bit high las 2 days.....6.3-6.5 due to my error
Temps 72-73f day 60-63f night
Great circulation
For some reason the last day or two have noticed a deficiency, on the Rhino is seems to be suffering from a Magnesium Def, and the Himalaya seems to be suffering from a Potassium def, the Rhino looks to have a slight start of Potassium as well. Just trying to get some opinions on what you guys & gals think. Do you think 2 days of slightly high PH could of caused this?? I need help.......
Oh and also using Hard water outta the tap which is coming out at 450ppm, PPM after adding nutes is 1250 with EC of 1.80 which should be right on track. I know there is some "eagle claw" that was going on a few weeks ago from over ferting, that seems to be under control now.......

I would flush them. I would also lose your tap water, go to RO, get some CalMag and up your ppms slowly....that 450ppm in your tap is crud and is most likely the source of your problems.

Good luck.