CerMedia MarinePure 1.5-Inch Sphere Bio-Filter Media for Marine and Freshwater Aquariums, 2-Quart

These came in such a small looking box I initially was disappointed and thought I would have to buy more. NOPE glad to be wrong, their were actually too many to fit in my canister tray so I had extras to put in another filter. Great deal. Thanks

I bought the smallest box. Thought it wouldnt be enough for my 75 gallon tank. It was perfect. Still waiting on result. Happy so far

Honestly this is the best media I have ever used. I used this with a combination of seachem stability and seachem prime to cycle my new tank. And in three days my water parameters were perfect where I was able to add fish. I highly recommend this product!

Great product

Between this and the algae in my refugium my tank is thriving. I dont even use a protein skimmer right now.

Great product and good quality but bag was already open

great bacteria homes

May be the best media I have ever used to grow a healthy bacteria colony. 2 months after installation my nitrates are down to below 5ppm. something I could never before achieve. I use this stuff in an nook and cranny I can fit it.

Very porous. Seems to do well and the sphere shape does not hold a bunch of detritus. I have minimal rock in my tank so these are doing a good job allowing bacteria to propagate and a nice home for various small critters.

ok