Biological filter media needs enough surface area to house the bacteria colonies that break down ammonia and nitrite, and not every media type offers the same amount. Dymax Bio Volcanic is a porous volcanic rock media built around exactly that surface-area advantage.
Why Surface Area Drives Biological Filtration
The beneficial bacteria that convert ammonia to nitrite to nitrate live on surfaces, not in open water — so a media's total effective surface area directly determines how much bacterial colony it can support, and by extension, how much bioload your filtration can safely handle.
What Bio Volcanic Offers
- Naturally porous structure that provides significantly more surface area than smooth or solid media types.
- Long-lasting media that doesn't break down or compact the way some biological media can over time.
- Drop-in compatibility with most canister and sump biological media compartments.
How to Use It
- Rinse in tank or dechlorinated water before adding to clear dust without harming the porous structure.
- Place in a low-flow-restriction area of your filter to maximize water contact with the media's surface area.
- Avoid tap water rinses on established media, since chlorine and chloramine can harm the bacterial colony living on it.
Dymax Bio Volcanic is available at Marine Concept Supply in a 1kg size — order online or pick up at our shop in Wheeling, IL. Shop Bio Volcanic, and browse more aquarium care products.
