Stay Flooded!
by snowdropp
Stay Flooded! keeps air pockets from forming in blocks that a player breaks underwater, so submerged blocks fill with water instead.
What it does
The mod is data-driven. When a block is broken next to a fluid source, the broken space can be turned into a fluid source instead of air, which stops air pockets from forming in submerged structures. Only fluid sources that touch the broken block on a side or below it trigger the change, so blocks broken in dry areas behave as usual.
Flooding behaviour is set through datapacks rather than code, so a pack author can register custom rules for which blocks and fluids take part. The author points to the wiki for an explanation of how to customise the mod with datapacks, and asks users who hit bugs or need help with datapack customisation to raise an issue. The author also discloses that generative AI tools were involved in building the mod.
Stay Flooded! is built for Fabric only and has a single game version, 1.21.1, with its latest file, 1.21.1-1.1.0, published on 2025-12-14. A server running it needs every connecting player to have it too. The code is under the MIT License, and the mod is not open source.
Key features
Air-free submerged blocks
Breaking a block next to a fluid source leaves fluid behind in place of air, so flooded builds stay full of water.
Side and downward triggers
The change applies when the fluid source touches the broken block on a side or from below, which limits its reach.
Datapack-driven rules
Custom fluid flooding behaviour is registered through datapacks, with no Java code needed.
Wiki for customisation
Documentation on setting up datapack rules is kept on the mod's wiki.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who want submerged structures to stay full of water, and datapack authors who want to change how fluids replace broken blocks.
Questions
Does Stay Flooded! need to be installed on the server?
Which loader does Stay Flooded! support?
Where can a pack author learn to customise the flooding rules?
In the catalog
Stay Flooded! is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from snowdropp
Similar mods
What the author says
A simple data-driven mod which prevents air pockets from forming when blocks are broken underwater, and allows users to register custom fluid flooding behaviour through datapacks. When a block is broken adjacent to a fluid, if there is only either fluid sources or solid blocks on each side and downwards, then the…
Official listing
- Modrinth page
- modrinth.com/mod/stay-flooded
- Owner
- snowdropp
- Published
- 2025-12-14
- Updated on Modrinth
- 2025-12-14
- Facts verified
- 2026-10-15