Is sea salt tasting a bit less salty these days

[Kurokage]

We get our salt off the east coast of Japan, and I really think their is something wrong with the sea salt for the last several years. I'm really concerned about all the tiny ( don't know the science word for it ) tiny particles of plastic that we might be digesting by using this sea salt.

What do you folks think?

Do you know anyone who keeps a marine aquarium?  You could measure the salinity of the sea-water with a cheapish peice of equipment used by aquarists called a Specific Gravity meter and keep the results.