I am bulk aging and about 1.5 months in. I added a 1/4 teaspoon of K meta when I started. I have Accuvin but honestly cannot determine info from that so went with blind 1/4 teas. The cap in the 3 piece airlock was always pushed to the top by the SO2 until recently. It started settling and is now back resting on the plastic piece within. When it was up, I knew it had adequate SO2, but now that it is down I am wondering. I intended to add another 1/4 teas of K meta at 3 months and then another at 6 when bottling. Do you think I am okay waiting or does the airlock give an indication to low SO2 levels? Thanks.