Tell me about it. I used to work for a company that had chemical plant on the west coast of scotland, that used seaweed to make alginates. Because different types of seaweeds have different types of alginic acids in them, as well as using indigenous types we also used to import qtys from Peru, Iceland and NZ, which were harvested in those locations, air dried, baled, and then shipped (to prolong shelf life and reduce costs of shipping water)
Once received it was then rehydrated with sea water (not in short supply) before being drained and passed on to the next stage in the process.
The man from the SEPA forced us to spend millions on a pipeline that went nearly a mile out to see to pump out the effluent. Which was – seawater contaminated by particles of seaweed. Top job, fella!