yan402answered grow question 2 days ago Hey man, don’t know that soil brand myself, but that yellowing between the veins on new leafs looks like early mag deficiency.
Even with pH in range, things can still get blocked. Tap water’s usually got calcium, but not much mag, and too much cal can lock it out.
I’d try:
Dropping pH to around 6.2 for a bit
Slight bump in cal mag
Maybe a foliar spray with Epsom salts before lights out for a quick fix
If new growth comes in clean, you’re all good.