I'm no expert on Algae. I would suggest you first diagnose which type of algae it is. Second, search for posts by Tom Barr on how to treat, control and prevent that type of algae. Here are a couple links that may help, but there are a ton of other resources out there. Its hard to tell from the picture, but is the algae mainly on the glass? If so, possible green dust algae?
Green Dust Algae: Forms on the glass creating a dusty appearance across the glass. Sometimes so bad you can't see into the tank.
Cause: Low CO2. Low nutrients. Quite common on new setups.
Removal: Easily removed with a magnetic glass scraper or similar. Often reappears very quickly. Allow the algae to run its full cycle by leaving it well alone for 3 weeks. It may become unsightly but just bear with it. Then scrape it all off and do a large water change. Sometimes requires a second treatment to fully clear and leaving it for 4 weeks. Recommended to slightly reduce dosing during treatment.
http://www.theplantedtank.co.uk/algae.htm
http://www.rexgrigg.com/Algae1.html
Looks like your baby tears are rooting nicely.