salt is basically all the same the only difference I noticed using different salt is the calcium content it varies along with cost.
after trying different brands I went back to what I started with Kent Marine. it meets my needs and I found a shop that sells it to me for 15% over cost $27. a box . I get a good deal since I pay for 6 boxes upfront . nice part I don't have to take it all at once so I don't need to store it and I know I get the freshest salt ,
I like how it dissolves quickly giving a good even mix