I concur with the various products mentioned, I have had good success with all of them. But you might want to stick with liquid and not the substrate fertilizers (tabs or sticks) given the plants you mention. Anubias
and Java Fern
root on wood or rocks, not in the substrate, so liquid fertilizer added to the water will be sufficient (and less expensive). Heavy feeders like swords benefit from substrate ferts, but I don't bother otherwise.
As for moving them around. Anubias
and JF attach to objects as I mentioned, so the object can be moved; if you do pull the plant off, try not to damage too many roots. But I suggest leaving it attached to whatever.
Most substrate-rooted plants can withstand some movement as long as it is not excessive (too often). An exception are the crypts; you don't mention any crypts, but they are one group of plants that should never be moved unless essential, as they frequently "melt" if they are.