Rio Escuro Black Shrimp Soil – 2 lb Bag
Rio Escuro by Brightwell Aquatics is an aquatic substrate designed specifically for shrimp and plants. This soil is suitable for aquariums requiring an acidic environment (pH less than 7.0) and low general hardness (GH). It is recommended to use RO/DI or distilled water with this substrate to maintain its buffering capacity and extend its lifespan.
This substrate is used in all Caridina aquariums that require a pH below 7.0. We have used it for years and consistently achieved reliable results. It is ideal for shrimp and planted tanks where stable, low-pH conditions are needed.
Reasons to Use
- Keeps aquarium pH below 7.0
- Optimal for Taiwan Bees, Pintos, and Cryst shrimp
| Specification | Value |
|---|---|
| Weight | 2 lb |
| Color | Black |
| Best For | Shrimp and planted aquariums with pH below 7.0 |
| Water Type Recommended | RO/DI or distilled water |
FAQ
What is the ideal pH level for this substrate?
The substrate is designed for aquariums with a pH below 7.0.
Can I use tap water with this soil?
It is recommended to use RO/DI or distilled water to preserve the substrate’s buffering ability. Tap water may affect pH stability and reduce effectiveness.
Is this substrate suitable for all types of shrimp?
Yes, it is especially suitable for Taiwan Bees, Pintos, and Cryst shrimp.




Austin Sanderson –
Used this soil in my shrimp tank for six months. The pH stayed stable below 7.0, and my shrimp are active and healthy. No algae issues either. Only used distilled water as recommended.
Steven Short –
Good for planted shrimp tanks. The black color looks natural and the plants grew well. I noticed the pH remained low throughout the cycle. Would use again.
Donna Wilkins –
Perfect for my Cryst shrimp. The substrate keeps the water acidic and the shrimp stay vibrant. No need to adjust pH frequently. Highly recommend for low-pH setups.
Michael Lawrence –
Works well, but I had to use distilled water to maintain pH. Tap water caused slight fluctuations. Still effective for shrimp and plants in a small tank.