Salt maker Koshin Odo once performed an experiment to show the differences in salts.
First he picked up a bunch of crabs from the beach.
He put a handful of them into salt water made from refined manufactured salt. The crabs died almost right away.
Next, he put another handful of crabs into salt water made from fresh water and unrefined rock salt. They died within two days.
Then, he put the last handful of crabs into salt water using his brand of unrefined sea salt. The crabs lived. What’s more, the aquarium began to produce more life!