Hello.
I have 2 screens in my system. Because of the layout of my sump I put them in diferent configurations, although both have the same flow and light, one of them has a significaly larger amount of algae than the other.
In the one with less growth, green algae never has spawn, but in the other it takes no time to algae appears again after the cleanings.
I think the problem could be the water flow, I know I mentioned both has the same amount because a "T" conection that came from the main tank, but the one with less growth is made from a pvc tube with a cut in the middle (longitudinal) where the screen is inserted, like the initial scrubber design posted in this forum.
Because of this half of the watter runs to the back of the screen where no light is present and the other half is where minimal growth is present.
What can I do to make this screen to grow more algae just in one side where the light is present? the design with a cut in the middle may not work for this case right?
Please advice.
Good growth all flow one side:
Minimal growth flow divided between two faces of the screen:
System layout