A Bubbling Demi-John

I've strained the elderflower wine into its demi-john: it's obviously still rather murky, but smells yeasty and fruity, and is bubbling away quite quickly. It didn't seem to have generated much foam, but I haven't filled the demi-john too much, in case: the excess is alongside in an air-locked bottle, ready to top-up in a week or so.