When you folks do kill algae, you need to focus on what caused it to begin with, so focus should always be more on what drives plant growth.
Focus on plant growth.
Excel and pruning, cleaning , routine maintenance will beat algae back, but good plant growth is the goal here........you did not get into this hobby to learn about algae and toxicology did you?
If you do not tend a crop field, do not give good conditions for the crop plants........it gets covered in weeds and it takes time/labor/cost to remove/add herbicides etc. Same deal here.
Take care of the plants well, then you will not need to spend more $, labor and time.
Check the CO2 and really watch the plant's growth and the routine care(water changes, dosing, feeding fish, pruning, maintaining proper parameters, cleaning filters etc) .
That's how you get a nice tank, not adding algae killers.........