Using yeast nutrient

At what point can I put it in the boil? @ 10 minutes? The bottle that I have doesn’t have any instructions on it.

That should be fine.

Are you adding it to the brew pot or the yeast starter?

I’ve added nutrient to the last 5 of the the starter’s boil in two batches; and added none to the brew pot itself.

Both batches exhibited lots of bubbler activity within 3-4 hours. The second batch got so vigorous that it blew the lid off my fermenter bucket. Maybe a starter AND nutrient on a 1.05-ish 5-gal is overkill…

The stuff definitely works.