Once the star is exposed to air there is no hope. They will certainly die. Sorry to be the bearer of bad news. Linknias are difficult but they can be done. They need to be in a mature tank of at least a couple yrs old. When you get one you MUST
make sure it is not exposed to air for even seconds. Watch the LFS
put it in the bag underwater. When you get home Take some of the LFS
water out and add some of your tank water. Do this about 4 or 5 times and then it should de diluted enough of the LFS
water that you can quickly put the bag under water and bring the star out and quickly bring the bag out. If you have a mature tank he will find microbes to eat.