Apparently, I have been mixing my nutes wrong. I always pH my water first and only then I will mix in the other liquids.
So the proper order is silica > base nutes > calmag > additives > pH
The roots are growing healthy tho. Despite the challenging start, loving the DWC project so far. Heard that once the roots touches the water, the growth will boom. Let's see if that's true by next week.