I am looking for some advice on sulphites, 23L barrel aging, and red kit wines. Right now I do not test for sulphites, I know I should (I am saving for a Vinmetrica). Those who test sulphites and use a 3 month barrel ageing, what average amount of Kmeta should I be using for this 23L barrel time on a red wine? I currently use 1/8 tsp approximately every 4 months when it is in glass, and I use an extra 1/4 tsp for the three months barrel aging. Is this ok guess work? I would really like to get a couple of kits bottled before I am able to afford the Vinmetrica. Any advice/knowledge appreciated!