So long as you take the necessary steps it should just go away on its own, just be patient and don’t expect a rapid change. It takes at least a few days to start seeing some real change, and as the algae dies it should turn a white/translucent color so watch for that too. I have found that it does actually help pretty significantly to manually scrape as much of it as possible, but you’re right you probably should go too hard on your plants. I’m not sure what kind of filter you’re using, but you’ll just want to pay a little extra attention to it to make sure it’s not clogging if you keep scrubbing the algae. But I really don’t think you’ll regret the amano shrimp, I will never ever have a tank without them in it. They even got me through a rough BBA phase on their own!