You should post a picture, majano or not, I don't think I've ever seen a "rose" coloured majano before. I'd still love to see them!
I thought you said some of them were loonie sized, if so, seems to me that's an awfully big majano.. The pencil-eraser sized ones though, that seems like a fairly typical majano size (I think).
I have brown majano's taking over my 110g cube, other than a bit unsightly and proliferating faster than I would like, they don't seem to be causing a problem. However I'm hoping to move my CBB in there soon enough to shutdown the tank he's in and I'm hoping he has a zest for majano to the same degree he has a zest for aiptasia..