Proper finite water
This mod alters water physics to make its behavior more realistic after you scoop a source water block.
Now small 2×2 puddles no longer contain infinite water — just four buckets, and they're completely empty. However, large water bodies — lakes, rivers, oceans — remain inexhaustible. You can take as much water as you want from them using buckets or pumps.

To determine whether to allow the game to generate additional water, the mod analyzes the surrounding area and checks if we're at a sufficiently large water body. The shape of the water body and biome don't matter here.
Another small but important change: it's no longer possible to fish anything out of small puddles with a fishing rod — because it simply doesn't make sense.