I downvoted because the poster didn't back up any of its claims and these kind of hit and run, insulting posts are getting more and more common. I am starting to suspect there's a concerted effort by green energy shills to infiltrate these message boards and spread nonsense. We know there are organized efforts by bad actors to spam sites and spread discord and misinformation, and these kind of attacks have become so frequent that one really becomes suspicious. Green energy has big, institutional money behind it and a vested interest in lying to the public who subsidizes it about its viability, so there's plenty of motive to misuse sites both large and small for this purpose.
Yes, this is a good idea. Farmed salmon in the USA was fed in such a way that they had much diminished Omega-6 content versus wild-caught. However, I am not sure if practices have changed since I first looked into it, which was in the later 2000s. It is harder to track down suppliers to verify in the USA because of the supermarket phenomenon here.