Well the wifes plants went to hell in a handbasket on our 1st grow..so after a massive clean of the tent we are on to #2..
2 seeds from a Fem Challenge Pack & 1 Auto Clone..
Its amazing when I got actual soil & not cheap crap from Wal-Mart
Leaf displaying attack areas . Grab some spinosad / loupe to look over and under leaf.
Soil may have been infected. Happens in some bag mixes. Check plants under normal lighting.
Maybe from that “ cheap “ soil you mentioned.