Aquaforest® Probiotic Reef Salt Expiration Date?

[GSMclowns]

Hello there,

I got a gift card and wanted to buy a few bucket of Aquaforest® Probiotic Reef Salt while it is on sale. Anyway, I won't use Probiotic Reef Salt right away since I have few buckets of Reef Crystal left. So what is the expiration date on those Aquaforest® Probiotic Reef Salt? Can I just leave the buckets there for a year and use it when all my Reef Crystal is gone?

Thanks