Slime Rain is a minor event that consists of frequent spawns of Green, Blue and Purple Slime and rarely Pinky.It occurs randomly, signaling its beginning with the message "Slime is falling from the sky! Carpet over water, bottom-half slabs, fences, or stairs. -- Notch, June 12, 2011. The former aren't so bad but the latter are a pain until you have enough NPCs around to keep them from spawning. you bought the slime hutch for a reason -.- "problem is," there is no problem with the OP's two-year-old suggestion. Slimes in a slime chunk can spawn even if there's plenty of light (below y=40, of course). Those blocks do not stop individual mobs from spawning, but they DO prevent mob packs from spawning, which is the first step in spawning mobs. How many types of slime are you keeping in your corrals? Slimes spawn below Y 40, in a slime chunk (on my private island anyway), when it rains - only way I know to stop it is change biome to nether/hell (and put up with the chickens), change to desert as mentioned above or build above Y 40. Certain players are facing this issue in Minecraft where slimes are not spawning in slime chunk. But placing slabs above the pumpkin/melon seeds will stop the slimes from "knocking" out the seeds you planted The tarr forms when a largo slime eats a plort that it doesn't naturally produce. There could be many reasons why slimes aren’t spawning. The massive amount of guardians that spawn are affecting the efficiency of my farm. Also monsters will only stop spawning around your base when you have 3-4 NPCs (maybe less) it won't stop them from spawning anywhere else though. – SF. Here are some reasons why they won’t spawn: ".Slime Rain continues until 150 slimes have been defeated, at which point King Slime will spawn. The fence isn't a magical barrier that forever prevents you from entering. If that largo goes and eats, say, a plort from a tabby slime, it'll end up turning into a tarr. Let's add either you use spawning of the swamp biome, Y = 50..70 in light levels of 7 or less, or you use slime chunk spawning, Y < 40, any light level. It's about four times as fun as shaving." I found out on the Minecraft Wiki that slimes spawn underground in "slime chunks" no matter the lighting, and the way to stop this is to use glass or slabs, so I plan to use slabs. As an example, say you have a largo that's a cross between a pink slime and rock slime. I built a slime farm before realizing that an underwater monument is in the hostile mob spawning range of the farm. Most players don’t understand the spawn mechanic of slimes in Minecraft. Slimes can spawn in any light level, so having your area well-lit will not stop them. You can stop them from spawning by lining the floor of your area with transparent blocks, such as glass or … If King Slime has previously been defeated, he will spawn after only 75 slimes … If you're in a swamp biome near the surface but in a slime chunk, the slime chunk will actually interfere with your farm, spawning slimes in the caverns below and filling up the mob cap. However, just as with other mobs, slimes require an opaque block to spawn on top of. "I think I'm starting to like this `programming' thing. All I need to know is, should I place the slabs at the regular floor level, or a half slab below? Will the slimes still spawn if the slabs are at a regular block level? Glass or slabs are most likely a better option though, since this method can be tricky; you might have to fix any neighboring slime chunks too, possibly up to two chunks away. So a crude test to see if there's no slime spawning at all would be to find a slime chunk, remove all blocks around it (within the server's view distance), create a floor at y=0, light it up and wait for spawns. There's clearly a gate shown in the image. Glass floors also work to stop slimes and other mobs from spawning. Is there any other way to stop them from spawning … If you want to go in there and kill slimes and/or pickup loot, then go do it. Though in many cases, this is not a bug, rather the fault of the player.