That's a lot of acid. A liter of water is roughly 2.2 lbs (1 kg), so they're dropping almost 20,000 metric tons. However, acid is heavier than water, so it's definitely even heavier.
Well I caught up, and what a chapter to do so on. Looking forward to seeing the Legion's POV, seeing what Morrelia does in the end, and how the Legion will react to being looted.