Aqua Ultraviolet® Ultima II Filters with 2" Inlet/Outlet Complete Aquatics Reduces biological oxygen demand (B

Reduces biological oxygen demand (B

use air stones rather than these diffusers

Barley straw is a great natural clarifier

rocking piston air compressor

powder-coated aluminum handle

Aqua Ultraviolet® Ultima II Filters with 2" Inlet/Outlet Complete Aquatics Reduces biological oxygen demand (BThe Ultima II Filter is the best choice for home hobbyists and aqua professionals alike due to its impressive capacity and minimal, effortless maintenance. Independent laboratory testing confirms that the Ultima II filter is superior to three leading bead filter brands in setup, nitrification, back washing and overall efficiency. It's perfectly designed for high flow rates, extreme fish loads and elevated feed rates. Why Use a Biomechanical Filter? To