Nitrax
JUWEL Nitrax reduces nitrate levels in your aquarium, leading to a considerable reduction in algae growth. Nitrax is a biological filter containing specialist microorganisms to break down poisonous metabolites (ammonium/nitrite) in your aquarium, thus reducing the danger of fish mortality. Nitrax also reduces algae growth by anaerobically breaking down nitrate, thus supporting the vitality of your fish.
Characteristics of JUWEL Nitrax:
- Reduces nitrate
- Promotes plant growth
- Increases the vitality of your fish
- Purely biologically active
| Feature | Description |
|---|---|
| Filter Type | Biological filter medium |
| Primary Function | Breaks down nitrates and ammonium/nitrite |
| Algae Control | Reduces algae growth through anaerobic breakdown |
| Benefit to Fish | Improves water quality and fish vitality |
FAQ
How does Nitrax reduce algae growth?
Nitrax reduces algae growth by anaerobically breaking down nitrate, a key nutrient that fuels algae proliferation.
Is Nitrax safe for fish?
Yes, Nitrax is purely biologically active and helps maintain safe water conditions by breaking down toxic metabolites like ammonium and nitrite.
Can Nitrax be used in planted aquariums?
Yes, Nitrax promotes plant growth by reducing nitrate levels, making it suitable for planted aquariums.

Colin Cornish –
I’ve used Nitrax in my 50-liter tank for three months. Algae growth has dropped significantly, and my fish seem more active and healthy. The filter medium is easy to install and maintains stable water parameters.
Madeleine Grant –
After adding Nitrax, I noticed less green film on the glass and my aquatic plants are thriving. It’s a simple solution to reduce nitrates without chemical additives.
Faith Wilson –
The product works as described. Nitrate levels dropped from 120 ppm to under 20 ppm in two weeks. My fish have shown better color and energy, and the tank looks cleaner overall.