I have started a second "first batch". The first "real" batch I used a small Kit in a demijohn. A few days later I started a larger Kit in a fermentation bin. I noticed today though that the later one, the one in the tub, doesn't seem to bubble as much as the small demijohn. The demijohn was very aggressive bubbling a lot. The tub, in its 3rd day of primary, at 22 degrees constant, is bubbling about once every 3-5 seconds.
Should I be concerned? I do noticed there is more "space" in the tub than the demijohn but not sure if this is the reason.