1、Natural and Safe: Natural river rocks, colored in non toxic colors, are brightly colored and can decorate fish tanks and aquariums well. 2、Widely Used: Colored river rocks can be used as fish tank and aquarium decoration, or placed in gardens, shelves, parks, libraries, shopping malls, or any public place, making them great decorations. 3、Hideout: There is no harm to water quality and aquatic animals and plants, not only can be used as decoration, but also can provide a hiding place for small fish and shrimp. 4、Clean Look: Every fish tank decorative colored stone is unique. They are very clean and have no dust or powder adhesion. 5、Harmonious Appearance: Colored river rocks can decorate aquariums or turtle tanks well, keep the water clean, and make the fish or turtles get along with the stones more harmoniously. 5 x Fish Tank Decorative Colored Stones Item Type: Fish Tank Decorative Colored StonesMaterial: StoneSize 1: Approx. 7.5x4x8cm / 3.0x 1.6x 3.1in Size 2: Approx. 9x4x7cm / 3.5x 1.6x 2.8in Size 3: Approx. 7x5x3cm / 2.8x 2.0x 1.2inSize 4: Approx. 7x 5.5x3cm / 2.8x 2.2x 1.2in Size 5: Approx. 5.5x4x2cm / 2.2x 1.6x 0.8in Use: Fish Tank Decorative Colored Stone