Hello, This plant was given to me in September and it quickly flowered, the flower lasted about 2 weeks. I'm in australia. the plant is not necessarily native. The tiny bit of white fluff you can see has grown since the flower died. I thought maybe it was mealy bugs (from my internet reading) but all treatments have had no effect on the fluff, even from my mum who is an expert gardner, so now i'm back to thinking it's natural. I really need to know how much to water it, how much light etc. and whether the fluff is the cactus or something else. i've so far been watering it not even enough for any to come out of the (well-drained) bottom. and giving it indirect light by a big window. because it's new and been through a lot with the move i'm not confident with repotting or anything drastic like that as I think this plant needs some time to settle.