I have seen Carbona products in our Hancock's store. However, I frequently find Shout Color Catchers at estate sales - always really cheap there.

I did a google search to find the differene between washing soda and sosa ash. You need to use 2.7 times as much soda to get the same results as soda ash.

Super Walmarts carry them. At least in FL they do. You don't have one of those within driving distance?

Some stores carry their own brand. Our WalMart has a housebrand of color catchers. they are usually near the laundry or dish soap products.