Box Contents:Replica Live Rock (Specially designed to interlock for easy arrangement)Instruction Booklet (Simple to follow step by step guide)Hydrometer (Built in thermometer for accurately measuring salt levels)Food Sample (Sample sachet of marine food)Salt Pack 500g (Sufficient to convert your biOrb or biUbe)Marine Cartridge (Special mix of three cleaning and purifying chemicals)Easy Plant Pack (Adding instant interest and color to your aquarium)The Marine Conversion Kit eliminates the complexity of recreating your biOrb or biUbe into a tropical enviornment. Not only has the kit finally made conversion easier than ever, it also provides a step by step manual on how to set up & convert your biOrb or biUbe.