if you were to mix some of it up and put a small frag in it, one of the same kind as one that was lost by the OP, It's survival or demise would at least tell you if it was the salt or not.

From there, testing would be needed to see if there is something in it there that is not supposed to be or if something in it is more concentrated than it should be.

A pretty simple test as above (and has already been suggested) would definitely add some important information to the issue and at least indicate if the salt needs to be tested or if other potential causes need to be considered more seriously.

thats because i do not know the answer, it could have come from one of 5 places that i get salt from, no idea, i grab a bucket from my stash, never kept track of what buckets came from where

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.

Why are you taking this so personally? I made it pretty clear that I have no interest in getting it tested. The only thing beneficial thing that would ever come out of it is maybe a free bucket of io that I'd use to de-ice driveways with.... Its not worth the effort it would take to put it in a zip lock bag. The damage is done, I've accepted that there is no fixing it, so I'm moving on, as should you.

why make a thread about it then ?

I believe the word is venting
So why not make a thread about it

You must have seen "blame the salt" posts in the past and known exactly how it would pan out....

The only difference here is that it's usually not someone with so much know how and experience posting it.

I think that fact just makes people more curious as most others who make a statement like this are uniformly dismissed.

Also, many of us use io.

You scare people with this kind of a claim.

You may feel there is no point, but the rest of us who use io and know you know your **** would sure like to know for sure if it was the salt we all use or not.

I use IO....

:laluot_08: Good god people he said it was the salt... There is no onus to proof, it's an opinion the can take it or ignore it. If people are so worried send your own salt away to get tested. As someone else said it doesn't seem to be a widespread epidemic so go on living your lives.

I'm thinking you don't understand what a forum is used for ? If you come on a forum claiming salt nuked your tank , people are going to be curious why . If it was indeed the salt would you not want to find out what in the salt caused it? If you want to forget about it and move on why make a thread about it and not expect anybody to wonder why ?
I would send my own salt away for testing if it nuked my tank if not for me but all the other people that use this salt. Never had any issues using reef crystals so I have no need to get it tested. Is salt even safe to use after 4 hours of mixing? Was always under the impression to let it mix for 24 hours. Either way its obvious nothing is going to come from this original poster is not going to send any samples in , it sucks for the rest of us . Will continue to use IO until there is actual proof the salt caused this.