potasium def or nitrogen toxicity

I was afraidthe flush had compacted the soil by displacing the air. So I started mixing it and I found mold. It's drying out and dyign now. Any big deal?

Not great, let it dry out. Maybe do a weak neem watering which is a natural fungistat. You've had good advice here but pics would be ideal.

The tds of the rainage went down to 300 ppm. What level is bad? I've heard 1.5 is the most you can tolerate but that doesn't sound fiesable. Is that in ppm? Plus i think the flush flushed my nutes out and im seeing n def. i mixed in some new mg soil to supplement it (I have 2 cb ft left), I'm damned if I do and damned if I don't. At this point I'm ready to go buy some foxfarm and replant everything. My ph won't go up with flushing, I'll add some limestone soon if I have to. Would a complete soil change be too much of a shock. I'm a little bit broke now, I've invested so much already. If i repot into more suitable soil like foxfarm (I've seen in my local indoor grow store) I'll need to buy nutes right off the bat to, right? Sorry there's still no pics. Thanks for all your help.

All growth is stopped and a lot of leaves and DEAD. Confession time. I only flushed with equal amounts of water to soil. Not 2 to 3 times like I was advised. Is 300 pmm still too high? Does it sound like my ph is still too low. I'm just testing my water drainage with an aquarium water tester. I'm going to scavenge for some money to buy a soil tester and nutes. I might even bring pictures to my in-laws and upload them there tonight. I'm on the computer at work now. Thank you all.