Blue-ish circular stuff on phal orchid roots ):

[TryingmyBest]

Hello,

I recently bought this orchid (first time orchid owner) and noticed that it had some powdery white mold on it. I then spritzed the roots with Listerine (as I read that hydrogen peroxide can damage the roots and that Listerine is a better alternative) and repotted it into a new pot with new medium from WilGrow. After a few days, I came back to this blue-ish stuff growing on the roots that are at the bottom and some had white stuff. I'm honestly at a loss on what I should do... Any advice is appreciated!!