Minecraft wiki entry for Slime_farming, associated text: The simplest slime farm that requires the least amount of resources is Jioge's 1.8 slime grinder, which has been tested to work in 1.16. This farm requires a spawn chunk, at least 9 signs, 3 hoppers and a chest, and many torches. Glass blocks are also helpful (particularly on top of the chest so that it can still be opened without letting water or slimes into the collection room). Because slimes can swim upward and horizontally, it is important to note how water is placed in the drowning trap.