I've been having FPS drops with the Aquatic Depths, come to think of it. The game still runs correctly, just slow. I run Terraria through Steam, and I turned on the FPS counter to test; it went from a stable 60 to around 25 at the lowest while I was in the Depths.
I haven't tried the Icy armor; I'll do that next time I play.
I haven't tried the Icy armor; I'll do that next time I play.