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

Great stuff for the aquarium, makes a difference in the water quality. Got one star taking off for the damaged packaging and a couple are crushed inside. Not a big deal since i needed the filters and it did help clearer the water and increase quality inside.

Product came with a few broken balls. Unfortunate, but still works. May be supply or transportation. Who knows.

This isnt the first time i grabbed these. Grabbed some from a fish store. I’m cycling my reef tank and needed something quick so i bought them online (even though theyre pricier in comparison to others) got it and the balls were cracking and dust were everywhere some were broken. I added about half of it in my tank, hopefully it doesnt crack and dust while in my tank.

Keeps my tank clean.

Works great in hob Refugiums seen progress in about 2 days

All of the MarinePure products are awesome. I love their media blocks.

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.

Muy bueno para el sump de mi acuario

Fits perfectly into the reservoir on my fusion 20. They also expedited the cycling process immensely.

Been in 125 gallon reef tank about 6 months works as described