M1Wino.
As I mentioned above, when the SG is unchanged 3 consectutive days fermentation has stopped. You will have to check SG at least every couple of days even in secondary to know it has stopped dropping.
Yes you can use an fpac to top-up, but if you add an fpac or sweetner you must add sorbate to the wine when you add the k-meta then wait about a week before adding the fpac. If you add an fpac or sweetner with out sorbate your wine may start to ferment again and if you have topped-up you may end up with it foaming over or through your airlock.If you have already added the k-meta thats ok, you can still add the sorbate before adding the fpac.
LOUMIK
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