Natural rocks "The reef Rock" (20kg) - Size S Contains a mix of small size rock ranging from 13 cm (5 inch) to 20 cm (8 inch) size. Each rock weight 0,5 kg to 1,5 Kg. Collected in the Oceania tropical nature. 100% natural rock, 0% artificial rock. THE REEF ROCK® is a ready-to-use natural rock collected from a sustainable source causing a low environmental...