Mold? SOS

What's up gang!

It's been a little while since I've been on and seems this forum website is still up and strong! I love it!!

So this year in Maine is my buddy and I's first year growing in a greenhouse and so far I would like to mention that I've witnessed some amazing results! Starting off with 18 clones - a variety of Blue Dream, Chronic Thunder, Snow Bud, Green Crack, and Strawberry Kush, this has been one of my favorite and most challenging grows yet. It's been a hot and humid summer over here with little rain, and as a first time greenhouse grow, we started running into a few problems right off the bat.

At first it was a powdery mildew problem which we had been combating since pretty much the very beginning. After trying almost everything we researched on diluted PM killers, we decided to buy some GreenCure, which if I remember correctly is just Potassium Phosphate, and it worked pretty well. We also added more fans and so far we haven't seen any more signs of powdery mildew. HOWEVER...

Recently we've been stumbling upon these little black dots that look like some kind of mold of some sort. It started off on the undergrowth and is now working it's way up the stems and onto the middle foliage. We we're hoping someone with experience would be able to identify, and lead us in the right direction. We thought maybe it was just powdery mildew that had died after spraying some greencure but it seems to be spreading.

Here is our set-up if it helps diagnose the problem-

We are growing in a 13' x 33' Greenhouse with 18 plants (two rows of 9). there are about 10 screen windows on each side that we keep open 24-7 and they are about a foot from the ground (just to get some natural ventilation) We have a box fan on both entry door windows (also screened) with one pulling air in, and the other pulling air out. We also have two box fans inside in the middle. The humidity stays relatively around 40% and it gets as hot as 85 degrees in the middle of a really hot day.

Thanks for your time and help guys! Sorry if this post was a little long I tried bolding and underlining the main question lol - I will attach some pictures shortly

This is what it looks like

Watch this video 18 minutes into it. I would foliar feed the silica and get it right on the pm and do some at the root zone as well. The silica does it thing as far as what harley says about crystallizing the cell but its the high ph that kills the mold. I would use a different brand than Raw dynatek would be my choice if you have to use a lot of it over the course of the grow. I can tell you that 75% rubbing alcohol and 25% water and a little dish soap will kill your plants this was a test to see what that mix would do to a plant to kill spider mite eggs but the alcohol will kill PM I think, I haven't tried a 50/50 mix yet as I kind of lost interest in it been using neem for that. It took a few days if I remember for it to get jacked, thought that the 50/50 it would survive.

Does the black dots rub off any?? And by the looks of your pics it looks like you still have PM.

Watch the harley videos somewhere in one of them he talks about calcium and amino acids to help the calcium get into the plant to strengthen the cell so the PM cant get a hold on to the plant if I remember right.