Best way to save a plant, is to learn to grow the plant. This is your goal, really, you did not start this hobby to learn ti kill algae, to learn to...
Does the algae grow mostly where the current hits the plants? If so, a little more CO2 and trimming those plants so as to NOT block the flow will be...
100 micron's quickly turn into 50-20's pretty fast as they clog.
You can swap those 100's out for a 50 or 20-25's say 1-2 days after a water change....