Betta can you find a pic of the brand you use? how much do you add a day and initially? I will have these ducks hatching soon, so that counts as niacin for ducks too correct?
I use Fleischmann's. You have to get it from bulk stores, because even Wally world charges $4 for the little 4oz jars of it. It comes vacuum packed in 1lb foil packs and two are packaged together. I use maybe 3 tablespoons on the bottom of the bucket, add a gallon and a half of hot water (yeast first, water second helps dissolve it), then I do 7 overflowing scoops of mash. My scoop is the plastic 2 cup dog food scoop from the Dollar Tree.