mates....
To my eye, that's looking like early Zn defc., though Fe and Zn can often be co-deficient... To tell them apart, have a look at the pics in the Defc. Pic Depot; typically(but not always), Fe starts from the "palm" out to the tips; Zn tends to hit tips/margins, then interveinally,... But the first thing to determine is if the soil pH is the cause, or if it's a case of simple lack-of (more likely here with Biobizz, and nutes being acidic).... some of the micros like Zn and Fe are locked out at or near 7.0+... Adding more nutes may not cover this without overfertilizing, so a dedicated product is the ticket here,.... Foliar is the fastest way in, used along with soil dosing; a wetting agent is key to any foliar applications, along with spraying the underside of the leaves especially, as there are far more stomata there, only way in (unless you use a product like Optic Foliar's Transport)....
...check out your supplements, I think AlgaMic may have the micro's,... I'd still look into a better dedicated product, they tend to have higher levels of the ions and more readily available forms,...