No Random Ticks

Random ticks are a background update that Minecraft gives to loaded blocks each game tick. Fluids that receive them keep recalculating and spreading, and that work adds up on busy servers. The mod can stop fluids from performing random ticks, so a fluid block stays as it is and keeps interacting with its neighbors. Vanilla has only water and lava, and lava is the only fluid whose random tick sets things on fire, so the option matters most for fluids added by other mods.

The mod is server-side only: players join without installing it, and the server alone needs it. It is published for Forge and NeoForge across eight release versions, 1.20.1 – 1.21.1, with 0.4-1.21.1 for 1.21.1 and 0.4-1.20.1 for 1.20.6 as the latest files. Random tick prevention can be toggled through gamerules, and a config file records which blocks were blocked and which failed. The license is All rights reserved.