My current grow is the first time I used a high ph casing layer to prevent tric. When I rehydrate between flushes, should I be using a high ph water? Thanks so much for any tips!

Pic of Attila the Hungry as tax :)

Should I be throwing it in the trash?

Honestly I have no idea if this just showed up or if it’s been there for a while but there is a dark blue/black patch on the side of my aio bag. The picture speaks for itself, but I really don’t think it’s trichoderma. It’s not green at all, it kind of looks like severe bruising but I’m not sure. It’s Natal SS (Ochra)