Green water

[Richer]

I'm lean towards the "not bad... but definately not needed" side of the arguement. If you do have a uv sterilizer, I don't see the harm in using it. In all honestly, I cannot see myself investing money in a UV sterilizer for my fw tanks. A good water changing and feeding routine, plus a low-moderate stock goes a long way in keeping water quality good in an average fw tank.

-Rich