Originally Posted by
Floyd R Turbo
When you have a screen that is oversized per the load (bioload, feeding, etc) then you can encounter an issue with getting GHA to grow because the growth is spread out over too wide of an area.
rog I just checked your posts and I remember you had a brand new tank with 2x 10x10 screens then you went down to 1 10x10 screen. With that big of a screen on a new tank with little to no load, I would not expect much growth. Also if you started with truly "dead" everything, you might not have much diversity of life in the tank, it is my experience that the best scrubbers work on a tank with a lot of different life.
A skimmer can knock out nitrates pretty well if they are not too high and feeding is not too heavy, I've seen that happen. But once you start to get a lot of bioload and feeding it wont keep up, the opposite is the case with the scrubber. The more diversity in the tank, the better the scrubber performs.