yeah i remember that...I too did NOW kelp powder and thought it was decent, however old posts on this forum show that they changed their source a while back, and the new kelp is not nearly as good...
how is the frontier kelp?
the reason i did not choose that was because its Icelandic, and I know ML recommends Norwegian over Icelandic (I think Norwegian comes from colder waters?)
either do you know anything about cold water kelp and arsenic percentages?