I have been using a DIY waterfall scrubber for many (10+) years now. (Quite a few of those years using two banks of Turbo's LEDs.) A couple of things though: 1) If I go on vacation, or get lazy, screens do not get cleaned weekly. 2) Algae scrubbers do tend to produce a bit of extra detritus 3) I have considered a rollermat device for normal detritus as well. So I came up with an idea to make an automated rollermat scrubber. The "screen" would be fleece, moving about 1" per day. As water goes through it, it collects detritus. As it goes up in the LED section, it grows algae. As it gets full, it exits top, it dries out, and is rolled up. Monthly or so you replace fleece roll. I already have some worries, but thought I would throw it out there for fun.