Not exactly a macroalgae but is simular: where can I purchase seagrass in the UK?

[Don'tMindWhatYouCallMe]

Probably helped kill the seagrass, too

True

 

[Don'tMindWhatYouCallMe]

Ok so uh looking back on this now I pretty much just eyeballed a random amount of table salt into tap water, even a miracle would not have saved that