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

I bought these for my saltwater tank and the water has been crystal clear!

Great product and a great price

Great stuff. Run in all of my aquariums.

Excellent quality product.

MarinePure is now the only ceramic bio media I use. Bottomline: Its like upgrading your filters bio system with steroids.

Perfect product! Needed staple for marine tank!!!! Have this & a Marine Pure in my sump! LOVE IT AMAZING NEEDED

A+ Service and product

Replaced the bioballs that came with my SeaClear system 2 tank with these. Fantastic product with much better bacteria growing capacity. Help keeps water parameters extremely stable. Have a reef tank and have been able to push water changes back to every three instead of every two weeks with no degradation in water quality.

So far so good. Its filter media, hard to say whats better then what. Im a big fan of bacterial filtration over mechanical/chemical so these are perfect! Id probably get the plates if my tank had the room only used about 2/3rd of the box in my 28 gallon all in one. I rinsed then in my water change bucket but probably should have done a second rinse, water had a slight haze to it till the next water change.

great bacteria homes