The first acrylic algae scrubber: The SM120 (or SM100 as it was called) in 2008, made of clear and mirror acrylic, with T5 lights, designed to fit on the sump in the small space under the 90g bowfront reef in our Santa Monica office at the time.
This is the free open source design that everyone uses/copies. It works, but it's hard to clean the bottom of the scrubber, and it leaks around the pipe, and it can't go near the sump water because the lights are not submersible, and to take it to the sink requires lots of disconnections. This is solved by our current patented RAIN models.
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