These metallic gold polished decorative stones are very versatile. For vase filling, simply pour them into your vase to add an elegant touch. When using for landscaping, spread them evenly in the desired area. In an aquarium, rinse the stones thoroughly before placing them at the bottom. As for maintenance, just dust them off occasionally if used for decoration outside of an aquarium. For the aquarium, keep an eye on water quality and clean the stones as part of your regular aquarium cleaning routine. Remember, these products are non - returnable and non - refundable, so choose carefully.