Shelf Life of Salt?

[Stray32]

So I am getting back in the hobby, and I have a 5 gallon bucket of Red Sea Coral Pro salt from when my tank was up last, about 18 months ago. I believe I only used a few cups before my tank crashed, but the bucket was opened, and has remained sealed since then. Any chance its still ok to use?

 

[DgenR8]

As long as it hasn't gotten all clumpy, it should be fine.