Seachem Flourish Nitrogen
Seachem Flourish Nitrogen is a top-of-the-line nitrogen blend supplement designed specifically for use in delicate planted aquariums. Nitrogen is one of the three main macro nutrients, alongside phosphorus and potassium, that are required by aquatic plants. Its absence can become a limiting factor to healthy growth and development.
This concentrated (15,000 mg/L) blend of nitrogen sources provides essential nitrogen in both nitrate and ammonium forms. The ammonium is complexed and fully unavailable for fish consumption until utilized by plants, ensuring complete safety for fish and invertebrates.
| Key Nutrient Form | Concentration |
|---|---|
| Nitrate | Present |
| Ammonium (complexed) | Present |
| Free Ammonia | None |
FAQ
What is the recommended dosage for Seachem Flourish Nitrogen?
Please contact customer service
Can Seachem Flourish Nitrogen be used in a fish-only tank?
No, it is specifically formulated for planted aquariums and may not be suitable for fish-only setups.
Is Seachem Flourish Nitrogen safe for all types of aquatic plants?
Yes, it is designed for use in delicate planted aquariums and provides both nitrate and ammonium forms that are readily available to plants.

Julia Hamilton –
I’ve used this product in my planted tank for three months now. My plants are growing much more vigorously, especially the stem plants and mosses. The water remains stable and my fish show no signs of stress. It’s a reliable supplement that works well with my existing routine.
Dylan Vaughan –
The nitrogen blend helps my aquarium plants grow stronger and greener. I noticed a visible improvement in leaf development after a few weeks. No ammonia issues, which is a relief since I have sensitive fish.
Max North –
After switching from a basic fertilizer, my aquarium plants have grown more evenly. The product is easy to mix and the instructions are clear. I appreciate that it doesn’t release free ammonia.