Formula salt

[Ruth]

My tank is a reef tank and as I stated I am very happy with the salt. When I test it before water changes the calcium tests at 400 and the alk at 2.97meg/L. I was just curious who else was using it. I am sure this salt is from somewhere in Asia as a lot of the writing on the bag is some Asian language.
The only place I have ever seen it is at Aquarium Illusions tho and wouldn't mind knowing if there are other places to buy?