New to the forum, but very familiar with what you have, Thrips. Turn over the leaves and look with a high power magnifier. Many ways to treat. Though ,looking at the time of your post if you did not discover them and treat, you have more.Hail to the Elders! HELP!
RDWC 20 g
2nd week of flower
12/12 light cycle
Flora Series everything
Chiller at 66 degrees
pH 6.1 ( I just did a nute change and waiting for it to settle).
What is that mess on my leaves?