Quartz
Aqua Natural Diamond Black Bio-Substrate, 5 lb
4.6 · 65 reviews
$12.99
Sold and shipped by the online store behind the button; bags go back the same way
Diamond Black quartz seeded with live bacteria. Use it alone in a nano tank or as the living layer under dry Diamond Black.
Product highlights
- Live nitrifying bacteria
- 2–4 mm grain
- Cycles instantly
- Mixes with dry Diamond Black
- 5 lb wet bag
Bag sizes and prices
| Option | Price |
|---|---|
| 5 lb wet bag | $12.99 |
Specifications
| Base | Diamond Black quartz |
|---|---|
| Grain | 2–4 mm |
| Bag | 5 lb, wet |
| Use | Freshwater, planted tanks |
Good to know
Planted nano tanks under 5 gallons need just this one bag.
Orders and returns
The order, shipping and any return are handled by the store that sells it. See how orders travel.
Reviews by real customers
This is for freshwater aquariums only
This is for Freshwater aquariums only not saltwater.
Jenny · September 2025Color & Crystal Sizes are Perfect
Very black with tiny diamond like crystals. Reflects the light with sparkles. Not quite pool sand but pin head size granules
PRUESS · June 2026
Cycles instantly
Most reviewed
1:4 mixer
2-pack too