I picked one up for the Red Sea 750 in the library at Reef Stock. I got it installed, but never really got to see it in action before they shut everything down. I had 3D printed some for my tank a few years ago, but they broke too easily when installing them on the loc-line. I spoke the VCA rep at ReefStock and he told me that there was a special way to set it up to avoid that from happening, but I cannot remember the setting.