no need for carbon or ammo-lock in an establish, planted tank.
remember carbon really only removes odors, and medications, and is only active for about a week.
it's also possible that carbon will remove certain trace nutrients your plants need.
what I do in all my aquaClear's, planted tank or not, is run 2 sponges, and no bags of anything.
Former advisor and planted tank geek...life's moved on though.