It depends on how the light is mixing. If you can control or eliminate the sunlight then the minus green gel on the flos would be the trick. If you can not overcome the sun, gel your lights to match the sunlight. Again a minus green should do the trick. Probably looking to balance to the 5600K colour temp so make sure your gels actually are the minus green type and just not "rock n roll" pink gels-there is a difference. See Roscoe or Lee for proper gels.
Good luck
BTW there is also a thread about this issue over here
http://www.dvinfo.net/forum/photon-m...ally-dead.html dont know it the link will show up as it may be against forum rules to link to another forum.