How to stop creepers blowing up my Zombie XP farm
I have a zombie spawner that I have turned into an XP farm.

The problem that I have is that creepers spawn in the zombie spawning area, and end up at the bottom of the 22 block glass chute. Then, because there are a lot of zombies I don't realise there is a creeper, and it blows me, and the chute, up.
How can I prevent this?
Best Answer
I don't think all these elaborate solutions are necessary. This is a very simple farm that should work just fine.
From your diagram, I don't see a way for a creeper to spawn, unless they're spawning right at the bottom of the drop. Light up the bottom well enough so they can't spawn in there and you should be fine. Mobs don't spawn in water, so if the floor is all water under the spawner, you should be all set.
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How do I stop creepers from blowing up my XP farm?
Ranged weaponry is the best bet for killing creepers, as they need to be within 3 blocks of the player to trigger an explosion. If you stand outside of this range and shoot them, then they will not explode.How do you keep creepers from blowing up your house?
The best way to deal with creepers around your property is to dispose of them.How do you make an effective XP farm in zombies?
Making a zombie XP farm in MinecraftHow do you stop creeper from spawning?
Mines and underground passageways should be no wider than two blocks, to discourage mob spawning. Torches should also be placed at four block intervals. Use a fence or a wall to keep all mobs except spiders and spider jockeys off your lawn.Simple Upgraded Mob Spawner with Spider Killing and Creeper Proof (Minecraft 1.15 PS4, Xbox, and PC)
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Answer 2
Do /gamerule MobGriefing false. That will stop them from blowing it up. Hope this helps.
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