There is an ornament to suit every home in the samuel baker collectionr these ornaments simply slide over the bubble tube in the biorb easy to fit and remover available in a range of designs in small medium and large sizesr designs include coral clamshell and pebble stylesr small to fit baby biorbr medium to fit biorb 30r large to fit biorb 60 amp biuber can also be used in biorb life aquariums but will not entirely cover the bubble tube