If you’re interested in leveling up your Echoes, you’ll need a ton of Sealed Tubes. But where can you find them? Here are the best ways to farm Basic, Medium, Advanced, and Premium Sealed Tubes in Wuthering Waves.Wuthering Waves: How to farm Sealed TubesUpgrading your Echoes means upgrading their stats, which is important if you want to succeed in combat. Besides using other Echoes, the only way to level up your Echoes is by spending Sealed Tubes. One of the best ways to farm Sealed Tubes in Wuthering Waves is to battle bosses at Tacet Fields.Screenshot: PC InvasionAt a certain part in the main story of Wuthering Waves, you’ll unlock the ability to fight bosses from Tacet Fields. They’ll show up on your map and in your Guidebook under “Forgery Challenge”. The Boss Challenge list is an easier way to track all the Tacet Field bosses available, but unfortunately, their level isn’t listed so it’s hard to tell which boss is bes…