Large solid marble pebbles for decoration or to cover the ceramic media without obstructing the flow of water into the filterr clean flowing well lit water with fish is the ultimate way of transforming bad energy and feng shui pebbles are designed to decorate your aquarium as well as promote the flow of positive energyr available in four colours selected for their different feng shui properties the red pebbles are for power glory and happiness r once in water the colour of the pebbles dee