You can specify a custom difficulty using the password parameter of your mining software, (default is 8000).
( This only works for our Zcash pool )
Example :
ZecMiner64.exe -zpool eu1-zcash.flypool.org:3333 -zwal t1YZMnyXStuGKykkFxM6Lh8DTVJdTMx6R51.YourWorkerName -zpsw d=32000