Green Algae On Aquarium Glass

[puccie1]

Does anyone have a remedy on how to clean green algae of the Aquarium glass. My tank is 600 gallons and I can barely reach the bottom, I have tried magnets with scraper on end, scrapers with razor blades and giant magnet cleaner with rough padding and nothing works. probably due to angle Im able to reach it. Hoping someone has an idea up their sleeve that works. please let me know thanks

 

[jabberwock]

I have tried a bunch. I like this one.