Can I adjust my Crystal Filter to suit my Aquariums needs?

Crystal Filter allows you to adjust the water flow easily by pulling down the front outley for slower running and then moving up for faster flow. This adjustment is done in a few increments so you can adjust more sensitively. Crystal Filter also features a Venturi system which can also be adjusted. The venturi allows air to be drawn in when the pump is working. By adjusting the top control left / right you can control the amount of bubbles the pump produces.