Oh, ok. Most folks call that a float test.
It doesn't really matter. I use a garden hose to fill the container.
Keep in mind, ginseng seed can stand to be much drier than we previously believed and still be completely viable. In most cases, commercially raised seed will be so dry out of the stratification boxes that it will float. For that reason, many soak the seed for several hours or even over night and stir it up good before they discard any seed. Even then, I sometimes crack seed open that floats to be sure it is indeed bad seed. Anything other than firm, creamy white inside the shell means its bad.
In recent years, I've advised against adding water to seed unless it appears to be drying out inside the shells. Dry outside isn't going to hurt the seed's viability. Adding water drastically increases the chance for introduction or spread of disease. But, TN is right, plant it as soon as you can.