Add a lively splash of color to your aquarium with Oceanmax Rainbow Gravel Fish Tank Substrate Stones. Each 1kg bag contains a fun mix of 3-5mm artificial stones in a range of bright, eye-catching colors. This substrate is perfect for creative aquascaping, children’s tanks, or anyone looking to energize their aquarium setup. It enhances the appearance of plants and fish, is easy to clean, and durable for long-lasting use—making it a cheerful and practical choice for vibrant aquatic displays.