water changes wont get rid of the algae, you will still have to clean the glass and plants. you can get an algae magnet from your pet store for the glass and you could just leave the rest on the ornaments for the fish to browse on. i dont personally see a problem with a tank that has algae in it, it shows its balanced.
if you dont want any then a suppressant should do the trick, though be careful you dont over dose. i havent used any so i wouldnt know which to suggest.