So I made my scrubber for my other two tanks and still needed to make one for my 55G. I cut all the 1/8" plexi in my table saw and glued it together with Weld On 16. Drilled .012 holes in a 1/4" OD black water line 3/16" apart and made a light guard for the bubbler. I also drilled holes across the bottom piece so the water can flow through the unit. I did not use a screen for this one, but I did rough up the plexi for algae to grow on. the whole unit just slides up and off of the suction cups. It's been two days and the algae is growing in the scratches that I made. Not noticeable in the pics. I didn't paint it so I could watch the progress, but I will paint it later.
The temporary one I had in there I left open for the pleco to munch on and he cleaned it off...