What are Gulpers like with tiny fish? Like Danios for example. I always read about people who have added them in the tank as feeders and the Gulper never touches them. Is it true Gulpers aren't interested in fish under 2" or so? They strike me as being so lazy that they'd only move for a larger meal. Not that I'd ever fully trust them with anything, but it's just a topic I find curious. I wish there was a lot more info on these stunning fish.