Hi there, about a week ago I did a batch of extract brew using a recipe I've had success with before using S-33 yeast. For about the first 12 hours it bubbled away quite happily, but since a pretty cold night it has barely moved. (Where I live in Queensland, Australia, a cold night is 55 F). I've checked for leaks and there are none. Is it just fermenting really slowly or should I put in some more yeast.
Also, if I do put in more yeast and it doesn't need it, will that affect the taste badly?
Sorry if this is in the wrong forum...