Fusionanswered grow question 4 years ago That's not normal. Not there to see if is traceables of something else. But I'm sad to say from the image's looks like mold. UV-C with ozone is only thing I know that kills mold but it's not ment for plants will kill them. It's ment for sterilization of tents n rooms.
Will have to look up solutions that won't kill your plants. But if it's mold will infect the buds if don't get rid of it.