Fed to much cal mag, now I got a K lockout

so im pretty sure my problem is a potassium lockout since I'm in still in veg and my leaves are showing a K defeciency bad. Before this happened I fed 5ml per gallon of calmag a week prior(2 waterings ago). Which i think is a pretty high dose for plants that are only 12" tall I should've just done 1-2 ml. The bottle recommends 2-10ml per gallon. The last watering I used fox farm grow big at 5ml per gallon which is a half strenght. And the potassium defeciency is still getting worse so that's why I'm assuming it's a lockout. What should I do to fix this? Should I flush on my next watering? Continue to water normally without nutes for a while? Or just keep giving them a light dose of my veg nutes every other watering? I'm planning on flowering in like then 2 weeks so I need to fix this asap!

Nutrient antagonism, maybe go with a light leaching on next watering. You seem to have it figured out.

Looks like Magnesium to me but what are you feeding them?

People who use soil need to ditch cal/mag once a deficiency shows and treat one or the other. Using both can be counterproductive sometimes. Epsom or gypsum.