I have been getting this on past couple grows between weeks 5-7. @Mr. Grow It it seams any strain this happens about same time, it does stop once I'm a couple weeks into flower but I'd like to correct the issue and not have it any longer. I get a handful at the bottom s and a few in the middle. Only thing I can think is need more K in those weeks. The pH in and out is in range, ppm out is usually a little low but being this is only issue I haven't made any changes yet. I wonder if being I reuse my coco if I need to add a little peat and recharge with cal-mag. Thinking the K is just running through and not hanging around. Once a couple weeks into flower I raise the K intake which I believe is where the issue goes away. Would love be your thoughts brother, thanks.