I need some serious help. I’m a relative newbie to plants, but over the last 18 months I’ve been very successful and now have around 50 plants! All of a sudden, everything that has been thriving is now struggling or dead. Several pots have what looks like mild, but also appears webby if you look closely. Until a few weeks ago, I had every plant in straight potting soil (fox farms) but I wanted to put them all in plastic nursery pots so I could monitor root growth. When I repotted, I added perlite, orchid bark, hort. Charcoal, and some leca. In an attempt to create an airy mix I’ve somehow done the opposite (the leca is the perp, perhaps). Before I spend $100 on potting soil and repot everything again, can anyone tell me what I did wrong? I don’t think I overwater, but am I? Am I using too much fertilizer? Did I screw up with the repot soil mix? I’m not seeing evidence of pests (besides gnats). Please help. ðŸ˜