I would think you're watering too frequently (every 2 days). The soil doesn't look that light and airy enough to dry that quickly. The soil should be exceptionally dry when you water. If you hold the soil too wet it can make it more acidic which would make K unavailable. But, the plants don't look overwatered.It is super skunk
I water about every other day ph 6.5
Soil is just basic planting soil
I use nutrients once a week i am on 4ml. I use the a and b.
Led lights 300w. I have 3 of them over 10 plants