HA! Sorry, I shouldn't call them that by default, that's the name Daughter gave to our 5 red cherry shrimp... she says they all look like tiny Zoidbergs to her.
Okay. So algae are out-competing your plants for nutrients, probably because the plants don't have enough light to grow but the algae does.. get some better lights?
I run my tanks on LED lamps but they are made for marine tanks so actually do have proper kelvins, etc, and my plants are great, no algae. New bulbs are pretty cheap.. I read that incandescents aren't the greatest, though. OldFishLady is the person I would turn to for specifics on bulbs and what to get. She's pretty awesome like that.
Yes, you can get chemicals, but I am hesitant to recommend those, having read a few unfavourable reviews from fish keepers (and anyway, your plants will be happier with better lights).
So that's why I said shrimp, as they do love to munch the algae. Snails, too, I guess, but I can't vouch for those, I don't keep them. Yet. >> Nor have I kept ghost shrimp, but the RCS eat that stuff wherever they find it, I adore them.