Key Features 3 Pack Contains 1 Large and 2 Smaller balls. Non Toxic material Large ball fits over the centre bubble tube Easy to place. Weighted bases. Suitable for all size Aquariums biOrb Easy Plant Green Topiary 3 Pack Give your Aquarium a realistic look with the biOrb Topiary Moss balls. These easy to place ball shape plants will fit neatly in your biOrb tank. The larger Ball fits over the centre bubble tube while the smaller ones can be placed around it, making a great underwater display. A small weighted base on the bottom of each orb keeps them grounded to the base to ensure they don’t fall over. They can be easily removed when you need to clean the aquarium or if you simply want to change the look of your tank. The balls are made of non toxic materials and, unlike real plants, will not emit any dangerous chemicals into the water. This ensures they are safe for the environment and for the fish that swim around them. It is recommended that you wash all plants and decorations