A week ago I added a CO2 injection system to my 60 gallon planted tank (about 1 bubble per second under mid to high light). After five days I noticed that the water had turned green. At the LFS yesterday I picked up a U.V. Sterilizer which I understand should be able to get the green water under control.
What I'm wondering is if there is anything I need to be aware of or watch for with the U.V. Sterilizer. For example, is it going to kill "good" things as well as "bad?" How can I keep an eye out for problems?