> That D47 is what my local shop has begun carrying and I have noticed
> exactly the same thing! Even running over 100 bubbles per minute out of the
> airlock, with virtually no empty headspace!!! (That's how I keep track, bpm,
> LOL!!!)

I ended up adding a bit more sugar than I wanted to that dandelion
wine (SG 1.092) and the bubbles are coming out in a steady stream,
probably 3 or 4 per second. As I mentioned the gallon jug is filled
right into the neck where it is 1" across and the only foam is a
small ring around the edge less than a 1/10" wide.

And it's not just the low/no foam, some of the best whites I've made
were done with D-47. I end up keeping my EC-1118 packets from kits
for stuck fermentations and some fruit wines but reach for the D-47
for everything white. Although I have now split a kit between two
11.5 liter carboys and am doing it with D-47 and I thiknk 71B.

Don