I don't know what kind of setup you have or how bad your algae problem is, but honestly to get rid of the algae I would just let the shrimp eat it! They should be taking care of it, and if they're not, get some more and put them in there. They love algae and a tank full of it would be a feast for them!
Using an algae removal chemical will only temporarily fix the problem. Since your problem seems to be the extra light, it will keep coming back as long as the light is there. I still vote for just leave it be. Scrape the front glass and let the shrimp eat the rest.