Convert facebook fans into Instargram followers

Hey guys! I've grown a music facebook page to 20K likes with ads (those are real followers from the US and Europe mostly). I'm now launching an Instagram profile connected to that page. I would like to know what is the best way to get those facebook fans to follow me on IG ?

The organic reach is low on fb and posting a status about my IG page won't do much... Any advice is welcome !

When u post on Facebook add a comment like "Join my Instagram page" with your Instagram link

You can also mention your Instagram profile url in the website link section of FB page