I don't think it would hurt, but then again, careful dosinjg of many things will kill the targetted algae, whikle leaving the plants alone.
Copper has been used for over 60 years, H2O2 hs been used for over a decade, perhaps longer. Dips have been for about the same time.
A good prune, rotate to substrate under, corrected conditions have always worked and the algae has gone away. Bleach any equipment with it attached etc, clean things good.
That will make the tank look better, harassing the algae only here and there or little does no good. A good attack will really do it in.
Excel will not add enough carbon to the plant's needs to drive high light tanks. It takes longer for the plants to use it than CO2.
If the tank has high CO2 and you are certain of it and good nutrient levels and you are sure, and the algae is actively growing, then adding it might show a cause=effect without other confounding issues.
Be careful in assuming something caused something else.
PO4 can get rid of algae too after all
Regards,
Tom Barr