Where is the K in the super soil? i see none! why is this?

i tried feeding some seaweed to my plants in super soil and got a mag lockout. so yea this recipe is good on potassium.

My last two SS runs I added Kelp. Just a bit. Next soil is from scratch. No more bagged Roots. Also recycling. Tossing soil is a real waste and completely unnecessary if you amend the soil as you go.