I have some scummy green stuff that is collecting on my live plants, and it's collecting around the water line. It is also making my water a little cloudy. I'm guessing it's algea, but not sure. What is it and how do I get rid of it? You can see through it, it's almost like clouds of green stuff on my plants. I have live plants with 4 watts per gallon of light, DIY CO2, and my plants are growing like mad!