My original (Rev 1) L2 Algae Scrubber was recently featured on the LA Fishguys YouTube Channel. This version has been superseded by the Turbo L2, which is the second revision of the L2. It has a different heat sink and smaller overall profile. The Rev 1 and Rev 2 are otherwise the same device. If you found this site via the LA Fishguys video and are interested in learning more about Algae Scrubbers, please register and introduce yourself!