specification : per pcs average size 5cm~10cm.

• highly effective & well-known filter / filter material of a high-performance coral chips with high adsorption power abilities.
•  adsorbs & removes organic substances like ammonia, colouring, residual medication etc make water clearer.
• With excellent absorptive power, strongly absorbs yellowish of breeding water.
• decreasing the built-up ammonia & nitrates in your aquarium that  are harmful to fish.
• It is compact size to get into the small filter gap.
• High absorptive effect as filter media for upper filter.