Eco Plus Micro Bubble Air Diffuser Straight, 12" - Water Wind EcoPlus Water Wind Micro Bubble Air Diffusers are great for oxygenating hydroponic bucket systems, tanks and reservoirs The high performance EcoPlus Diffuser Straights are designed for higher oxygen transfer rates as compared to a traditional air stones This construction of the tubing is made from a rubber polymer and utilizes tiny pores that create extremely small bubble diameters