AN AFFORDABLE HIGH-PERFORMANCE OCTO Even the high-end octos of most dive manufacturers cannot match the performance of our most affordable Atomic Aquatics Z2 OCTO. That’s because we don’t cut corners. Like the entire Atomic Aquatics OCTO line, the Z2 is a clone of the Z2 primary Second Stage. Pair it confidently with any Atomic Aquatics primary and know it will perform reliably and effortlessly.