never ending battle with my nano

[Ross]

Well obviously algae is photosynthetic, it cant grow without light, but it also requires silicates and phosphates in the water to grow. Take away either one and you greatly reduce the amount of algae, or in your case donny, greatly increasing the lighting increased the algae. For the bulbs question, i think its because as bulbs get older the spectrum changes and they get more yellow. I guess that spectrum of light is better for the algae and grows it more. i dunno im just rambling but i think thats the basic idea.

[don-n-sa]

Ross...you are exactly right....I was just waiting for Gary to respond. ;)