wondering on some burns???

got some burns and just wondering what they might be? i also have some burns on the newer leaves that almost look like they are fish scales on the leaves? kinda weird. any info helps

are you feeding it nutes? if you are i would say its nute burn so i would give it plain water for a week to flush it through!! H T H

yeah that was my guess but wasnt sure. if im using sensigrow anyone know what ppm i should be using? at about 2 months. also anyone know any really good online stores for a 400 watt digital ballast and a hood. also looking for sensi bloom my local hydro store closed...wtf??