Because of the history behind the Cyklon second stage, there is a compatibility issue with modern standard second stage hose fittings and to address this issue Poseidon offers Cyklon specific OEM heavy rubber hoses. These low pressure regulator hoses have a standard 3/8-inch male at the end that screws into the first stage LP port, and at the other end you'll find a fitting compatible with the Poseidon Cyklon second stage regulator body. The hoses have a pressure rating of {500 psi | 35 bar} and are Nitrox Ready. As with the Xstream and Jetstream second stages, there are adapters available which allows use of standard regulator hoses.

Modern Cyklon first stages have standard LP ports that are 3/8-incn and standard HP ports that are 7/16-inch. However, on the very old "classic" Cyklon first stage, the thread size of all ports was 1/8-inch because there were no universal standards. If you have one of these rare old classic first stages, there are adaptors so you can attach standard sized fitting to your first stage.

LP adapter: 1/8-inch Male = 3/8-inch Female (Poseidon item number 2415)

HP adapter: 1/8-inch Male = 7/16-inch Female (Poseidon item number 2910)