So I was trying to keep this piece inside. It had been doing ok for the last year in its 4” growers pot with great root growth. I did not have a larger growers pot so I did just transfer it to the 6”ceramic pot I hoped it would live its happy little life in. Transferred about 6 weeks ago just Maine’s succulents and small handful of leca. I did give it minimal water then and I gave it a small bottom drink about 10 days ago with plans to not water again for several months. It has developed this blistering in the last day or two. 1. Best way to treat it? I’m guessing it’s a fungus. I have fungicides I’ve used for other plants, I don’t think it is safe for cacti so any recommendations? 2.Should I just repot it back to the smaller pot it was happy in, if I want to maintain it inside? Or , after treatment, just put her outside? This is a piece from a large outdoor plant