China soil.

1) Soak the crystal-soil in water by the percentage for 12-24 hours.pour it out and filter away excess water.
2) Take the plant clean the roots and cut the rotten roots and leaves. put the plant into glass vase and pour the soil into the vase, add some water when the surface comes dry.
3) This product is no poisonous, no pollution. It will no go bad or color fade, contain fertilizer.
4) You should place this product where there is no direct sunshine. Make sure children cannot get it. It cannot be eaten.

I bet the plant is already dead.