If it's marine then your best bet is to take it back asap. It will not survive for long without a properly maintained tank.
If you were thinking of setting up a marine tank for it don't bother. It's not regular salt. So you'd need to go to lfs to get it. You'll need ro water, either buying an expensive unit or buying some from the lfs. You'll need other equipment, live rock, and then about 4 weeks before you could put it in. And since you'll be lucky if it survives the night I think that may be too long. If it's still alive in the morning get it to a lfs.