I see that you have two pumps besides the outflow that comes with the system. Plus, you have sparse rock work. I am having problems with red slime. I think I don't have enough circulation. I'll add another pump and remove some rock to see if that will help. I also added carbon and polyfilter to remove nutrients to deprive the slime. I had chaetomorpha in the tank, but the red slime grew right over it. I took out the worse parts and will add more from my larger tanks. Wish me luck! Oh, another thing... What kind of lights do you use? I have the 70 watt 10,000K MH that it came with, but was wondering if it is too much. Someone suggested I change the bulb to 14,000K to decrease algae. What do you think?