I have been told by "locals" here at the coast that the salt will leach out of
the seaweed without harming the plants. I gather sea grass from the shore and
from a public boa tramp and then add it to my compost pile. I usually soak it
and rinse it first but have not noticed any harm to the grass where I soak it.

Ed Upshaw

Anna Maria Island,
A quaint little drinking village
With a fishing problem