I've created a zombie farm. However, the zombies are getting stuck halfway up the water elevator. I know the elevator works because I tested it myself before opening it up to the zombies. I went through and can't find any blockages.
Are they getting stuck at the point they start drowning and turn into drowns? What I’ve done for my farm is have the water push then into a kill chamber that drops the down about 10 blocks from where the y level of the spawner is at.
Yep. They're turning into drowns. The elevator is supposed to push them up, then over into a pit to a kill chamber for, basically, one-hit kills. I guess, I'll have to cut the elevator short and dig over to the pit. Won't be one-shot kills, but better than nothing I guess.
