I cannot say for sure that I have won the battle with the algae, but at least for the time being, I have the upper hand.
BTW, i Invented a simple device for dealing with string algae. NOT staghorn, it don't work there.
I took a fat dowel rod like 1 inch diameter, 2 ft. long. Took a cheap comb, widest teeth comb i could find. cut the handle off the comb, and drilled and screwed the comb onto the end of the stick. I use it to reach in and tease the string algae off the plants, twirll it once or twice and remove it from the tank, works very well. Usefull and free in my case as I had all the stuff just lying around.
Mind you, this does not work on the staghorn algae hardly at all. that stuff is anchored to leaves or substrate HARD. with this tool, you just end up pulling up the plant.