Seachem Flourish Nitrogen™

Flourish Nitrogen lets you add nitrogen to a planted tank without also adding phosphorus or potassium.

Key features

• Supplies nitrogen in both the nitrate form and a complexed ammonium form plants take up readily
• Useful in heavily planted, lightly stocked tanks where nitrate tests at or near zero and growth has stalled
• Adds no phosphate or potassium, so you keep control of your own ratios
• Works as a set with Flourish Phosphorus and Flourish Potassium

Test before you reach for this one. Most community tanks with a normal fish load already produce more nitrogen than the plants can use, and adding more will only feed algae. It earns its place in a densely planted tank where the plants have outrun the fish.

The rest of the range is in plant fertilizer and additives.