I have noticed i have been getting green water. Every day it gets worse even with the uv sterilizer. I have never had green water before. The tank never gets any direct sunlight or sunlight at all. I think maybe the lights are being left on for too long each day. the lights are on a timer set for a 12 hour cycle. Guess i'm just a little confused since i have never had green water before. Any suggestions or comments will help.