This is something I’m experimenting with now. It’s low cost, easy to use, and might just make make my beer a little more clear (instead of cloudy with a chance of hop balls). I’m exaggerating. Really, you don’t need gelatin to make great tasting, relatively clear beer (the most obvious way to have a clear beer is to pour it gently into the glass, leaving the sediment at the bottom of the bottle; something I’ve been doing from day one). It doesn’t transport well, but it works.
After the beer is done fermenting, add 1/2 teaspoon into some cold water. Wait an hour. Then, the instructions say to add boiling water. This will dissolve the particles into the water. But, what I do is this: microwave for 10 seconds, stir; microwave for 10 more second, stir; repeat a few times until it’s dissolved (not cloudy).
As of today, I’m trying this on a DIPA. It fermented for 6 days, then I dry hopped and put in cold basement. A day later, I added the gelatin. I plan on bottling in about 4 days.