Neither is likely to require much.. I think the pogostemon would likely do better being planted and root fed, but isn't likely to need all the liquid ferts you put into the water anyway.
See how it goes . You will see the results of over or under doing it over time if there's a problem, hopefully you will be fine.
See how it goes . You will see the results of over or under doing it over time if there's a problem, hopefully you will be fine.