Weird defects in leaves

[Awg52]

Hey, can someone advise the issue with my leaves on my purple lemonade, around 7 week old, grown in bio buzz light mix, using bio buzz nutes as per schedule at half strength, grown under mats hydro Ts 600, temp and humidity sitting good as per VPD schedule

 

[namvet25]

I would flush it with cal/mag and some flower nutes with phos and potasium.