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

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

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

I bought to put in a 65 gallon reef for extra filtration. seems to be doing its job.

Works great in hob Refugiums seen progress in about 2 days

Exactly what I was looking for.

Purchased multiple large bricks and smaller ones for my reef refugium. After 2-3-6 months started to crumble disintegrate to mush = large cleanup. Nitrate and phosphate high Went back to live rock and all good re water chemistry.

Great product and a great price

If your here like I was you know they are the best you can get , salt and fresh water

awesome

I cant even tell you how many different brands/types of bio biomedia products I have used over the years. I bought a box of these and actually fitted them in one of my HOBs, they are working amazingly well so far.