Checking SG

[HJ7]

I'm making my first batch and was wondering how often I should be checking the SG. There is still lots of activity at the airlock.

[Fl_Beak]

When you think it's done. As in there is little to no activity in airlock; unless you plan to stop the ferment for a specific ABV or taste.

[hipifreq]

What Fl_Beak said - only check when your airlock doesn't bubble. You can use a sanitized hose with CLEAN water in it to start a syphon. Pull enough out to clear the hose of the water, then put a little more in a graduated cylinder to check SG.