Yeah i saw the chart but i was wondering if anyone here had tried it. I stopped to see a friend of mine yesterday and she was in the middle of cleaning the couple hundred cages in her store and she was showing me the difference in how clean a cage is with or without a gobie. They make a huge difference! If i put the gobie in first would it make a difference? I just saw that the tanks with gobies hardly needed cleaned at all so i wanted to see if it was worth trying