Diy algea scrubber question

[DJMaximus]

I just had 1 question about the diy algea scrubber. Is it OK for the screen to just touch the water so there isn't a trickle sound? Or does it have to be about the top water level in my sump?

 

[sundog101]

In my experience it is ok

 

[DJMaximus]

Right on. Thank you