Why not to use io salt

[Myka]

Originally Posted by spit.fire

why not toss the salt without getting it tested, sorry i do not have a mass-spectrometer nor intend on to pay for the testing that it would require to come to a definite conclusive result

IO would do the testing with their lab. All it would cost you is a few minutes of time. I even made an offer to minimize that time for you.

Plus, if it was something like copper, your tank (rock/sand) could now be permanently toxic to invertebrates.