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

These filter media balls are designed to have maximum surface area. I threw them into the return pump area of my sump on my reef tank. Within 24 hours, pods were crawling all over the balls. A week later, my water is looking extra polished and my nightly pod swarms have gotten thicker. Macro algae and corraline algae have taken up residence quickly on these media balls. I used to only have live rock chunks around my returns but after putting these on top of the live rock in my return area, I have increased the filtration provided by that section many times over. I highly recommend these! I received this product at a discount in exchange for an honest and unbiased review.

I cant say a single thing bad about this. It would take me hours to type everything about this so Im just going to give it 5 stars. Great for sumps and all other filter types!

I don’t know if i got a different product or I’m just unlucky. The MP balls that I bought made the water on my biocube super cloudy, and I did clean them properly before introducing in the aquarium.

Muy bueno para el sump de mi acuario

I have not had it in the tank long enough but i love the design

Good stuff

ok

This biological media breaks down very easily. The media sheds drastically as you rinse it. If you squeeze it hard enough, pieces will break off. I recommend that you look into other biological media brands, such as BioHome, Eheim, and Fluval. I hope Marine Pure comes out with a better product, soon. Until then, this product gets one star.

Im afraid to use them, just because they are soo frail and dusty.

Exactly what I was looking for.