Buoyant

Buoyant changes how items behave when they are dropped into water. Items are sorted into groups: buoyant items such as wood rise and stay at the surface, neutral items sink at normal speed and do not come back up, dense items fall faster, and super dense items drop quickly, which covers bedrock and other unobtainable blocks. Some items float and some do not, with many falling somewhere in between.

Each item's level comes from tags, so a block placed under a tag such as bricks is classed with the other members of that tag. Some entries behave unexpectedly: the author notes that a 21-ton gold block still floats, and that a glass bottle is treated as containing air. Both sides need the mod because the behavior is applied to items in the world and to the server state that tracks them.

The mod is available for Fabric only, on the 1.19.4 game version, with 0.1.1 as the latest file in the beta channel. It runs on client and server and is released under the MIT License, so the code is open source. Its optional dependencies are Fish of Thieves, Villager Hats and Wraith Waystones, and none of them is needed for the core behavior.