chasv77answered grow question 5 years ago I would recommend feeding every third watering. I use fabric grow bags, and they dry up faster.
This is every 10-12 days or so. Lower your concentrate to 25% in the meantime.
Since this is veg, your newer leaves will not have that issue, if you reduce or stop feeding, till things clear up.
* note* Quality soil can last well past 30 days (4-6 weeks?), before feeding is required.
Once in flower, and you get nute burn, you will have to live with knarly looking leaves, through harvest, as new leaf generation slows tremendously, and focuses on the buds.