Little holes on fan leaves

[Cam3145]

I’m growing 4 banana kush photos in a 32’‘x32’‘x63’’ and I’m currently in week three of flowering. I’m using general hydroponics trio lineup and I feed every other watering. Lately I’ve been noticing little holes on my leaves. I got advice from someone on here, and I was told to use neem oil and a little dish soap. I did that last Thursday, and I don’t think nothing changed. Could it be something else? Also, for it to be week 3 of flowering shouldn’t my plants be bigger? I feel like it’s growing at a very slow rate