Our new Marine Kit contains everything needed to convert any biOrb / biUbe* up to 60 litres into a fish only salt water aquarium. Carefully measured Reef Salt Packs Hydrometer and Step by Step Guide are some of the contents which make the process of marine fish keeping much simpler and accessible to those at all levels of fish keeping. After sales opportunities include unique Marine Filter Cartridges designed to work with ordinary tap water removing the need for lots of additional chemicals and guess work. The Marine Kit is packaged in a bright and eye catching full colour box which clearly showing the contents which also include replica live rock easy plants and hydrometer with built in thermometer.