Cobalt Aquatics Biological Filter Media

Boost biological filtration with your choice of two innovative media options. Cobalt Aquatics Biological Filter Media offer the ideal habitat for beneficial nitrifying bacteria to colonize and thrive. Healthy bacterial populations mean efficient biological filtration that naturally process ammonia and nitrite toxic to koi, goldfish and other pond inhabitants.

Cobalt Aquatics Ceramic Rings are extremely porous, providing tremendous surface area for nitrifying bacteria. Ceramic Rings are designed to maximize water flow and oxygenation and provide an amazing total surface area of 21,800 cubic feet!

Cobalt Aquatics Bio-Globes feature an advanced design that maximizes surface area, water flow and oxygenation. Polypropylene bio-balls can compress from 0.95" to 0.86" without reducing flow through the media. Space-saving feature allows versatile installation options without compromising performance.

Cobalt Aquatics Biological Filter Media is great for use with pond skimmer filters, water fall filters or any pond filtration unit. 10.6 oz jar Ceramic Rings includes a media bag for easy use and replacement.

Shop all Pond Biological Filter Media.

Please click "More Information" for frequently asked questions regarding biological media.

Q. Does biological filter media need replacement?
A. No. Removing or replacing the media can severely deplete the bacterial population. The discoloration or film found on the media indicates healthy growth of the bacteria. However, if the media becomes clogged, you can use pond water to gently dislodge some of the material to improve water flow.

Q. What conditions do beneficial bacteria need for proper growth?
A. Beneficial bacteria thrive in conditions where they receive ammonia or nitrite as a food source, temperatures above 55° F, and oxygen. Fish waste and decaying food and plants supply the ammonia and water moving over them supplies the oxygen. Once beneficial bacteria are established in your biological media, they are difficult to destroy, except by over-cleaning, using chlorinated water, or using certain medications, such as antibiotics.

Q. What kind of maintenance do biological filter media need?
A. Check your filter regularly to ensure particles are not clogging the biological filter media and decreasing efficiency. Biological media should not be replaced unless it has become too clogged to function, and many times can be simply rinsed with pond water to unclog. In most cases, it is recommended the filtration system include mechanical media to filter particulate from the water before it reaches the bio media. This will slow the build-up and help prevent clogging.