I'm a fan of finding the root of the problem instead of just dumping chemicals that are only temporary solutions in your tank. I hear that one needs to balance the light, nutrients, and something else that I unfortunately can't think of right now.
Planted 10 gallon tank; 2 x 10W CFL; Fluval U2; MGOCPM/PETCO black sand cap
The Fraternity of Dirt #152
A Silent Cycled Tank