Granulated Alum Powder - Food Grade - 2 Lb Container ( Pickle Powder )

I used this while backpacking for a water clarification step before water purification. Mixing a pinch or two of this into silty water causes the dirt to aggregate, which causes it to fall to the bottom of the container. Then you can filter the clearer water at the top. This prevents your water purification filter from clogging as quickly.

These granules was extremely good quality and worked well for my intended use. I used it to improve my harvest, and was surprised to see such impressive results. The value was definitely much better than Amazon or eBay. I would highly recommend this product to anyone. 10/10.