does salt mix ever get old

[jacob]

i was wondring if salt mix ever gets old cause ihave a bout 45 gallons worth and i have only had it for a couple of months and it is hard as a brick so i was wondering if i can still use it or if i have to buy new stuff :cool:

[Alf]

The salt it self will be fine. But if it is hard as a brick then this shows that it was expose to air and there will be loss of trace elements. IMO I would throw it out and buy new. But that just me.

[MJC]

As Alf pointed out, salt that is exposed to moisture will harden and may need to be disposed of. It's happened to me before, I found a somewhat full but leftover bag of 50-gallon mix that was somewhat hardened. Someone I knew had his tank crash so I mixed up the bag and used it to rinse off his rocks. If you want to save it, I'd suggest using it in a similar fashion. I'm not sure how much trace elements is lost over time.