My plants are dieing please help

I have checked the ph it's between 6 and 6.4 also if you look at my grow diaries I talke about the nutrients I use But 1500 ppm 600 npk 10-10-10 Just before I flipped them I water with 10 -5-6 npk 1200 ppm Cal mag botanicare Ppm 400 -600 They were behind on it so I was giving them 1 1/2 tbsp per gallon. I'm actually thinking it's a micronutrients problem. I have really given them any liquid seaweed extract for micronutrients because I have kelp meal in the soil do I didn't think it would need it but now I'm thinking it's what the problem is. Also I don't over water them and I don't let them wilt either. The GG hates over watering and so dose the do si dos 33. So no wilting in-between watering.

Also have to checked your PH? Your soil PH should range between 6.0 - 7.0 To check soil PH with out soil tester simply water with a PH of 6.5 and test the water that come out the bottom. If out out range continue to water with correct PH. If signs don't slow down then might need a flush. The plant will have poor uptake of proper nutrients with out the correct PH. So plant will appear deficient.

i'm pretty sure is a potassium deficiency.

Al parecer le falta agua al sustrato o no la está absorbiendo adecuadamente prueba dejar agua a punto de goteo