Kelp fished from human sea is not a problem for several years if it is stored properly because it contains a lot of sea salt. It takes some effort to store it for a long time. Roll up the salvaged kelp strips, put it in a well-ventilated environment, and let it dry naturally, so that it can be stored for the longest time, or it can be simpler. It is stored in piles, which should be controlled not to be too large, and ventilation is also necessary, and then put desiccant.