Here's the situation: 20 gallon quarantine tank, lightly planted, 4 mystery snails, 2 nerite snails, 2 small angels, 3 green cories (juveniles about an inch to inch and a half long) and 5 OTOCINCLUS. Tank parameters are good and steady, light came with the tank so it isn't adjustable. I've got Easy Green and I'm not afraid to use it. On our most recent trip to Petsmart, we picked up the otos. I like to have algae in this tank because it's the quarantine tank for the 75 gallon as we're doing the initial stocking. I had a decent amount of algae in there that the snails were slowly working through but the otos have eaten almost every scrap. I either need to grow more algae ASAP or I need info about anything else the otos will eat. They don't seem interested in algae wafers or Rapashy Super Green. Any help or advice would be greatly appreciated.