Hey all, My attempt at an algae scrubber. Basic idea was to make it as safe as possible, so I housed it within the sump & used the return pump to feed it. The LED is from the bay, search with: Hydroponic Plant Flower Flood LED 24 red (630nm, 660nm) and 6 blue (430, 460nm). I'm rubbish with DIY but this was as simple as it gets. The only tricky part was getting the pipe to sit just below the sump cover, but above the baffle to ensure no rattling. Has only been up a day or two, will post results when I get them. Rixter