Flourish Nitrogen 500ml

This liquid fertilizer is intended for hobbyists whose planted aquariums show nitrogen shortage, such as yellowing leaves or stunted growth. It supplies nitrogen without phosphorus, so the nutrient balance can be managed separately from phosphorus dosing.

Why it matters

• No free ammonia release: the ammonium ions are in a bound form and become available only once taken up into plant cells, so the product does not release free ammonia into the water during use.
• Nitrate component: half of the nitrogen is in nitrate form, which plants that can use nitrate absorb directly.
• Dose-based correction: the beginner dose raises nitrogen by the same amount as a 1 mg/l nitrate solution, which gives a measurable reference for each application.
• Test-based monitoring: for an accurate reading, the nitrate test result is multiplied by 2, because half of the nitrogen in the product is nitrate.

Specifications

• Volume: 500 ml
• Total nitrogen: 1.5%
• Soluble potassium oxide (K2O): 2%
• Phosphorus: none
• Beginner dose: 2.5 ml (half a cap) per 160 litres, twice a week or as needed when deficiency symptoms appear
• Advanced dosing: higher doses in proportion to tank volume and target nitrogen increase, following the manufacturer's dosing formula
• Weight: 0.5 kg
• EAN: 000116062305

What it works with

The product is designed for planted freshwater aquariums and is dosed by water volume, so it scales from small tanks to larger ones. Because the dose is calculated per 160 litres, the same bottle can be used across different tank sizes. Regular nitrate testing allows the dose to be adjusted to the plants' actual demand.