Long Description:
The Rotating Arm is the most efficient way of circulating water over and through biological media, ensuring the effective and even water distribution and higher oxygen levels. The 15mm Rotating Arm does approx. 1000LPH. It has hole sizes of 33mm to 35mm for the Barrel Union. They have self lubricating ball race bearings, Adjustable speed, full instructions, low profile, and have 3 sizes available.
