strawberry cough issues help

[Coronanitas]

So i have a couple of ladies here and one of them is a kyle kushmans strawberry cough that Im having trouble with. All are in 50/50 mix of canna coco and GH cocoTek PX coir perlite mix. Don't know why I mixes the canna with the GH. All ladies have been vegging for 5 weeks and feeding schedule is every third or fourth day as needed with little run off about 1/2L each. I skipped on the cal mag on all ladies prior to the last feeding and thats when the SBC showed sign. I have since brought back the cal mag to 3ml per gal on all besides the SBC being 5ml per gal. Im going to flip them this week and trying the 11/13 light cycle. Im having trouble dialing in the SBC as the pics show some kind of deficiency. Can someone chime in and shed some light as to whats going on. Thanks in advance for any help.-
The nutes I'm using are as follows:
Canna coco a&b half Rec. dosage per gal.
Humboldt-secret golden tree @ 2ml per gal.
Cal mag 3-5 ml per gal.
drip clean @.5ml per gal. every feeding
PH @5.8-
GH PH up&down

 

[Stealthboat]

Hmm might be a little deficient in potassium imo. Have you been using any micronutes? Maybe its just deficient in some micronutes?

 

[Conradino23]

Potassium toxicity in my opinion. Switch to pure water.