Choosetop Malaysian Driftwood Small Unique Driftwood-perfect for positioned almost plants and rocks to create the natural and beautiful mini landscape. It can releases acidic substances and a variety of minerals, which can improve the water pH value (PH) and KH value (hardness), thus purify the water and soften the water. It is compatible with freshwater and saltwater tanks not to mention ideal for aquatic plants Nocturnal fish and smaller fish like a driftwood shelter for hiding Visual variety - no two pieces are alike Has a natural ability to sink in water without scratching the glass tank bottom.