Hardcore Buoyance Mod
Hardcore Buoyance Mod 1.12.2 makes it so items in water float or not depending on their buoyancy or material properties. Items such as wood or plants will stay on top of the water, heavy items such as stone will sink and fluid like things such as slime balls will be equilibrium. Separated this feature from Better With Mods as it is easier and less hacky to implement it as a core mod.
Screenshots:
Requires:
How to install:
How To Download & Install Mods with Minecraft Forge
How To Download & Install Fabric Mods