My tank is 75g with approx 24g sump
My scrubber doesn’t use a screen. Screens grow sheets of algae. This is the Santa Monica surf 2. The algae grows 2” thick in a rectangle cube shape, it’s over 24 sq inches from a small enclosure. I harvested yesterday. I grow this every 7-10 days, it’s about 3/4” - 1” thick across the plate for size reference
The scrubber itself is 6x8x3 inches. There is no screen to scrape. The unit has strings inside which are 3d growth surfaces for algae to attach to, but they are small so algae can’t attach very tightly. I just grab a loose handful of algae and pull it out. No need to scrape, super easy.
I have used this scrubber with 10 fish in a 75g sps mixed reef, and now use it with 5 fish in a lps mixed reef. It’s plenty capable of handling more fish. I’m adding two anthias in a week or two