Disable trafficking betygen VLAN's

Hi,

We are about to replace an old Sonicwall device managing about 50 VLAN with a Mikrotik fw.

In Sonicwall OS there is a option to disable interface trust witch create rules so traffic is blocked between the VLANS.

is there a simple way to block trafic between all VLANs

in my lab setup i have put up 5 VLAN
vlan20, vlan30,vlan40,vlan50,vlan60 i want all of them to be able to access internet but not each other. we have got it working with creating two rules per VLAN.

Networks are for example:
Vlan1: 10.0.0.0/24
Vlan20: 10.0.20.0/24
Vlan30: 10.0.30.0/24
Vlan40: 10.0.40.0/24
and so on.

switchport1: Wan
switchport2-4: Vlan 1
switchport5: Trunk with VLAN 20-50

But when scaling up to 50 VLAN it will be ALOT of firewall rules.

so is there i more simple way to do this?

Many Thanks