Aqua Ultraviolet - Ultima II Filter 1000 with 1½" and 2" Valve Ultima II 1000 Filters:Ultima II Filter 1000 with 2" Valve 000 µw/cm2 (EOL) GPH: 1

000 µw/cm2 (EOL) GPH: 1

Instructions Manual

They also feature high-quality double silicone carbide mechanical seals (impeller side) for increased performance and additional abrasive resistance

Oase Water Trio Fountain Manual

Firestone EPDM Repair Kit:

Aqua Ultraviolet - Ultima II Filter 1000 with 1½" and 2" Valve Ultima II 1000 Filters:Ultima II Filter 1000 with 2" Valve 000 µw/cm2 (EOL) GPH: 1This is the next generation of filters and one of the best tools for Koi ponds. The Ultima II is specifically engineered to meet the environmental demands of koi ponds. The lightweight media is designed for very high flow rates. There is a patent pending on this tubular media which has low head loss and a very high biofilm surface. The "Y" shape on the inside and wings on the outside affords a protective surface under back washing and our patent