20 Pcs Large 6.3 Inches Aquarium Filter Media, Ceramic Fish Tank Bio Media Blocks with Dense Tiny Holes for Top Filters, Canister Filter, Koi Pond, Sump Tank

Color: gray Material: ceramic Size: 6.3 x 1.4 x 1.4 inches (L x W x H) Package Includes: 20 x bio media block Note: - Please refer to the measurement. Tiny measuring error is allowable in normal range. - There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.

• Double filtration: this aquarium filter media offers mechanical filtration for absorbing and capturing impurities, dirt, and floated particles; also features biological filtration to efficiently and bad substances and restore tank water to crystal clarity
• Purification, effective & rapid culture: each 6.3 x 1.4 x 1.4 in block features a hollowed structure with tiny, dense holes, providing strong absorption to filter debris and particles; a large enables helpful microorganisms to colonize, thus boosting a nitrification system to decompose bad substances
• Performance, long-lasting: constructed from ceramic and fired at 1200 ℃/2192 ℉, these blocks are rugged and durable to disintegration; ensure effective water purification for years
• Valve pack, 20 pcs: receive 20 large fish tank biological media blocks of 6.3’’ length and 0.6’’ hole diameter, enough for use and replacement; they are great for planted aquariums, freshwater aquariums, sumps, and ponds
• Application, wide: the aquarium bio media suits diverse filter systems, no matter if you use them in top filters, bottom filters, pond filters, canister filters, or custom grooved filters