depends on how many plants you have. in time the live plants will lessen the growth of algae as the live plant(s) and algae compete for nutrients.
But if you want a quick remedy, buy 10-15 Olive Nerite Snails which do not eat the leaves but will consume all the algae off the plant leaves and stems.
You can purchase these snails cheaply at azgardens for 79 cents a piece or around $3.00 a piece at Dr Fosters & Smith, or you can go to your local fish store.
hope this info helps