Soda ash is a sodium carbonate powder that dissolves easily in water and aggressively corrects very low, acidic pH levels. Soda ash works great at even the lowest pH levels and doesn't increase the hardness of your water. The 40 lb. bag typically lasts 1-2 years for most households.
Soda ash is usually mixed in a chemical tank and injected into your water lines with an injection pump.
I ordered several times from AFW. Usually everything comes pretty quick. Apparently the delivery company damaged the package this time. It took 10 days for it to be delivered this time. Again not AFW fault but I still had to put in more work than necessary.