I use a weekly cronjob for scrubbing my ZFS pool "zfsspace".
> nano /etc/cron.weekly/zfs-scrub-weekly
Code:
#!/bin/bash
# set PATH
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# set pool name
ZFS_POOL="zfsspace"
# start scrub
zpool scrub "$ZFS_POOL"
> chmod +x /etc/cron.weekly/zfs-scrub-weekly
and I send this my root email address, configured in etc/zfs/zed.d/zed.rc