Description Description Eheim 16/22 mm Diffuser is for use with all Eheim External Power Filters. Small and simple to fix on the tank glass Enriches the water with air/oxygen Recommended for sparsely planted aquariums or tanks with high stock levels of fish Positioning the diffusor at the water surface level also gives excellent water surface movement Air flow can be adjusted with a pressure adjusting clamp Part Number: 4005650
