Fluval Bio-Stratum Substrate
Made from 100% natural, mineral-rich volcanic soil from Mount Aso in Japan and infused with beneficial nitrifying bacteria, Bio-Stratum is specifically formulated to provide immediate biological activity and maintain ideal conditions for a thriving planted aquarium. Characterized by its non-compacting 1 mm powder granules, Bio-Stratum allows plants with even the finest and most delicate roots to easily spread throughout the porous substrate while absorbing a powerful mix of nutrients, minerals and trace elements that promote explosive growth and overall health.
- Promotes healthy plant development, vigorous growth and vibrant colors
- Infused with dormant beneficial nitrifying bacteria that, once in contact with water, are activated to begin the nitrogen cycle
| Specification | Details |
|---|---|
| Material | 100% natural volcanic soil from Mount Aso, Japan |
| Granule Size | 1 mm powder granules |
| Bacteria Content | Dormant nitrifying bacteria |
| Application | Planted aquarium substrate |
FAQ
How does Bio-Stratum support plant growth in an aquarium?
Bio-Stratum provides a rich mix of nutrients, minerals, and trace elements absorbed by plant roots. Its porous structure allows fine root systems to spread easily, and the infused nitrifying bacteria help establish a stable nitrogen cycle, promoting healthy growth and vibrant plant colors.
Is the volcanic soil safe for fish and invertebrates?
Yes, the volcanic soil is naturally mineral-rich and non-toxic. It is safe for fish and invertebrates when used as directed in planted aquariums.
Can I mix Bio-Stratum with other substrates?
Please contact customer service



Abigail Pullman –
My planted tank has grown much more vibrant since switching to Bio-Stratum. The roots of my plants spread easily and the color intensity has improved noticeably. The bacteria seem to be active within a week of adding the substrate.
Leonard Ince –
I used it in a 20-gallon tank with a mix of stem plants and moss. The growth was steady and the water parameters stayed stable. The granules don’t compact, which is a big plus for delicate root systems.
Carl Smith –
After a few weeks, my anubias and java ferns showed much better root development. The substrate feels light and porous, and the plants are thriving without needing extra fertilizers.