Kit
Aqua Natural Midnight Bio + Dry Substrate Kit
4.8 · 317 reviews
$25.22
Sold and shipped by the online store behind the button; bags go back the same way
Everything for one floor in one box: a 5 lb bag of bacteria-seeded Midnight Pearl and a 10 lb bag of the dry pebble, both screened to 2–4 mm and collected in New Zealand.
Product highlights
- 5 lb bio + 10 lb dry
- 2–4 mm smooth pebble
- Not chipped or crushed
- New or existing tanks
- Collected in New Zealand
Bag sizes and prices
| Option | Price |
|---|---|
| Midnight kit | $25.22 |
Specifications
| In the box | 5 lb bio-substrate, 10 lb dry gravel |
|---|---|
| Grain | 2–4 mm |
| Origin | New Zealand |
| Model | BIOKIT003 |
Good to know
In an existing tank, spread the bio bag over the old floor during a water change; it boosts a struggling cycle.
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
Perfect substrate
Looks super good in my tank and I definitely can tell it cycles it well.
allysa · August 2026great substrate
very nice substrate, easy to clean and looks great. however, even though its prewashed and screened, do your self a favor and rinse the substrate out anyway before adding and cycling your tank. there was small debris in it and the rinsing water came out visibly brown tinged for 2 rinses. not a deal breaker as it is very nice substrate, and 2 rinses was all i needed to do which is much better than other substrate
Jay · October 2022Bio Filter helper!!!
It helped me get the needed bio filter within my aquariums.
J · July 2026
Cycles instantly
Most reviewed
1:4 mixer
2-pack too