Marine Pure Cubes 2" Ceramic Biofilter Media: The ideal Copepod habitat
Why does AlgaeBarn like Marine Pure Cubes?
In addition to being one of the most porous and reef safe filtration media’s on the market, we have found that Marine Pure Cubes also make an excellent habitat for copepods. They love to live and reproduce in it and they enjoy the safety and shelter it provides- it’s kind of like an apartment building for copepods that also stabilizes your tank.
Due to its extremely porous nature, water is able to flow through this media instead of just around it meaning fish waste, detritus, and Phytoplankton (pod food) are constantly flowing through and providing the pods with a consistent food source. We like this media so much we are actually using it instead of sand or mud in the AlgaeBarn display tank Refugium. What’s really great is that the blocks can be easily removed for sump cleaning or detritus vacuuming and then replaced without having the hassle and mess of sand or mud that can be hard to clean, cloud the water, and even clog sponges, socks or pumps.
Marine Pure Cubes Ceramic Biofilter Media Information:
MarinePure Key Benefits:
- Provides an excellent habitat for copepods to live, hide, and reproduce.
- 100% Tested and Reef Safe. MarinePure is inert and chemically stable.
- An advanced bio-filtration substrate with tons of usable surface area for beneficial bacteria growth.
- 80%+ open porosity allows for maximum bacteria exposure and promotes excellent water circulation and less clogging
- Designed specifically to target ammonia and nitrite removal while minimizing nitrates
- Aragonite composition, similar to natural reef rock, naturally buffers pH while also stabilizing water chemistry.
- Reduces tank maintenance, and allows you to support a larger bioload in your tank.
- Easy to clean, sterilize, and reuse.
MarinePure Media Product Comparison
Surface area comparison 1½” MarinePure Sphere: approx 240 sq ft per sphere 2" MarinePure Cube: approx 720 sq ft per cube 8"x 8"x 1” MarinePure Block: approx 5,750 sq ft per block 8"x 8"x 4”MarinePure Block: approx 23,000 sq ft per blockOther Sizes:
MarinePure is also available as 1.5" Spheres, 8”x8”x1” Plates or 8”x8"x4” Blocks. • For additional biological filtration simply set the spheres, cubes, plates, or blocks in your sump. Can also be used in wet-dry filter set ups. • The Blocks are best suited for larger setups, they also make a great skimmer stand! PLEASE NOTE: The images on this page are for informational purposes only. Actual product will be shipped as loose cubes inside protective packaging.

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Our Guarantee
We take the worry out of buying Live Copepods, Phytoplankton, Inverts, and Captive Bred Fish online by going above and beyond to take care of our customers. That’s why we guarantee every order we ship will be 100% Alive On Arrival or we will replace it free of charge. Booya. We’ll even cover the shipping on the replacement no matter which service you choose. Double Booya.
About our policy: When your order arrives, be sure and inspect the contents to ensure everything is looking alive and well before you add them to your tank or put them in the fridge. We’ll give you 12 hours after delivery to make sure you are completely satisfied.
“We will take care of you and make it right”
If for any reason you decide something isn’t quite ultra grade, simply snap a photo of the unopened item(s) you would like replaced. Be sure to get the expiration date on the back label in the photo. After that, visit www.algaebarn.com/claims and submit the form. We’ll review the photo and have a replacement out to you faster than a six-line wrasse at feeding time.
Captive Bred Fish: We guarantee every Live Fish we ship to be 100% Alive On Arrival and we also offer a 7-day health guarantee on all Live Captive Bred Fish. In the event that your fish arrives DOA (Dead On Arrival), simply take a photo of the fish in the unopened bag/jar within 2 hours after delivery and visit www.algaebarn.com/claims to submit the form. If the fish is DOA, we will offer you a choice of either a full refund or a free replacement, including the shipping cost. If the fish expires from natural causes (this does not include being killed by tank mates, jumping out of the aquarium, being acclimated to the wrong environment, not being fed the recommended foods) within 7 days after delivery, just provide a picture of the expired fish and we will offer you a free replacement, however, you must pay for shipping, or a refund, less the shipping cost. We can offer this industry leading guarantee on all of our live fish because Captive Bred fish are generally healthier and hardier than their wild-caught counterparts!
Invertebrates: We guarantee every invertebrate (Invert) we ship to be 100% Alive On Arrival. In the event that your inverts arrive DOA, simply take photos of the DOA items within 2 hours of delivery and visit www.algaebarn.com/claims to submit the form. We will review the photos and issue store credit for any DOA Inverts!
Once your replacement order is processed, we’ll send you a brand new tracking number automatically. Thats it, pretty simple right?
So start giving your tank the love it deserves and order with confidence knowing that AlgaeBarn has your back.

Dontae Henderson (verified owner) –
Great product thus far. I cannot lie. I thought they were going to be heavier in weight. They were actually super light. And now I’m glad they are! Haha. I love how it looks in my refugium as well. Now just waiting on (chaeto) to come back in stock. As soon as it does I’m placing an order for that and pods.