I would buy the free SO2 test kit from George and use it so you know exactly how much KMeta you need to add.
During any bulk aging, I would test every 3 months or so and adjust.
When you get ready to bottle, run the test, adjust the level for the particular wine, then bottle.
During any bulk aging, I would test every 3 months or so and adjust.
When you get ready to bottle, run the test, adjust the level for the particular wine, then bottle.