I built an updraft Algae scrubber a while back, very simple design
Planted it in my sump but with my setup could only light one side, using a red grow light I bought off of eBay.
After a month or two I hadn't noticed any growth at all so left it alone and kinda forgot about it. Pilled some excess rocks against it, and let it be assuming there was little to nothing happening back there.
Last night I traded away the extra LR and this morning I decided to pull it out and put this failed experement away. Well to my utter surprise I pulled out over 2lbs of Cheato from behind the screen.
