Colder means longer, but at 5-7C it's amazing you are getting any action at all. Most ale yeasts won't do anything below 15C. If this is a lager and a lager yeast, expect the ferment to last a month.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
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