Doesn't have much green algae

[Wesley]

I got this pre-made SM100 unit with 2 lights at the beginning of the year. I've never been able to produce much algae from it. I've cleaned the sheet 3 days ago, and this is what I got. Even I don't clean it in a week, it is just a bit thicker but still not green. I have a 125g tank with 125g sump. No coral, just 4 tangs and 6 other small fish. Feeding them a couple of times a day with frozen food and/or dry flakes.

I just recorded this video this morning: http://www.youtube.com/watch?v=0hGD0Jaxb70

[SantaMonica]

If that's 3 days, then it's working good. Start multiplying your food by 4X for a couple weeks. Then 8X. Try frozen cubes.

[Wesley]

So, basically it just doesn't have enough nutrient in the water for it go grow like what you shown in your video?

[Floyd R Turbo]

What is your N and P at?

[Wesley]

Nitrate is 20. PO4 seems to be 0. Hard to tell from the color. Either way, with that much Nitrate, I would expect lot of growth in the scrubber.

http://www.myunreal.com/Other/Fish/scruber/PO4a.jpg
http://www.myunreal.com/Other/Fish/scruber/PO4b.jpg

[SantaMonica]

Correct; I'm probably feeding 20 times as much as you. Remember I have two of them running.