That looks like a very good design. I may have to try this on a nano tank I have. I ran an algae scrubber for years and finally had to tear it apart because it worked too well... It produced so much algae that I couldn't keep up cleaning it. My tank looked spotless but the problem I had was my algae scrubber kept overflowing. This was just a design problem and I intend to fix it and get the scrubber back up and running. Good site BTW!