Zombie XP grinder

[xMob]

If anyone can share their design for zombie xp grinder that'd be great. - I tried altering one with fence gates I saw on here. But its not very efficient when you have more than 4 spawners up there. the zombies have nowhere to spawn

 

[Darkninja27]

I used to have a zombie grinder. It was a 10x10 cobblestone floor with a 2x2 hole in the middle and I just placed the spawners in the spawn. :)

 

[xMob]

I used to have a zombie grinder. It was a 10x10 cobblestone floor with a 2x2 hole in the middle and I just placed the spawners in the spawn. :)

I will give it a go. thankyou.