ALEGI6 lbs Aquarium Ceramic Bio Filter Media Sphere for Freshwater Aquarium and Marine Fish Tank Sump, Canister Filter, Koi Ponds

Works great in my Canister Filter

I really like it alot it works well for my 50 gallon tank

Good price, good quality bio bags included

I recently placed ALEGI 2 lbs Ceramic Bio Filter Media Sphere in a spillway on my150-gallon outdoor pond, and it's been a solid addition.What I liked:Easy to use: Comes in small mesh bags—just drop them into the spillway compartment and that’s it.Decent porosity: Provides plenty of surface area for beneficial bacteria to colonize, helping maintain clear water and good oxygenation, especially in a compact setup.Great value: At about $15 for 2 lbs, it’s affordable and lasts a long time—refilled as needed without breaking the bank.What to consider:Media flow: In high-flow systems, water may bypass the interior porosity, so it works best as supplemental bio media, not the only filtration.Periodic maintenance: Rinse monthly in pond water to prevent debris buildup—otherwise you could see flow slow-down.Alternative media: For heavy bio-loads, sponges might offer more efficient filtration—but for a small spillway, this works well.Recommended UseIdeal for small ponds or spillways where space is limited.Use it to boost biological filtration after sponges/mechanical layers.Monitor inflow/outflow; rinse gently to maintain performance.Bottom line: The ALEGI ceramic spheres are an easy-to-use, cost-effective way to add ambient bio filtration to outdoor ponds. Not perfect alone, but a great complement to other media in smaller systems

Excelente producto cumple con todos los requisitos mi acuario tiene otra cara!!!

So far seems to be harboring the good bacteria necessary for good water quality

media filters better than oem filter media

The stuff does work but it's so small it gets caught in the clips to close the canister. So I will not be buying it again.