Freshwater filter blocks (4 pieces)

Features - Color: Yellow. Material: Quartz sand. Dimensions: Approximately 16 x 3.7 x 3.7 cm. - This aquarium filter media provides mechanical filtration to trap fine particles and biological filtration to promote the growth of living organisms. - The high-quality ceramic media is covered with thousands of pores, offering a large surface area for biological filtration and resulting in crystal-clear water. - This filter block effectively absorbs fish waste and debris, ensuring clear water conducive to breeding. - Suitable for freshwater aquariums, planted aquariums, swimming pools, and ponds.