Aqua Ultraviolet® Ultima II Filters with 2" Inlet/Outlet Complete Aquatics Barley straw is a great

Barley straw is a great natural clarifier

Reduces biological oxygen demand (B

5" or 2" Union

Begins to work immediately

use air stones rather than these diffusers

Aqua Ultraviolet® Ultima II Filters with 2" Inlet/Outlet Complete Aquatics Barley straw is a greatThe 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