Seachem Flourish Phosphorus is a concentrated phosphorus supplement specifically designed for planted aquariums. It provides a source of phosphate (PO₄³⁻), which is a critical macronutrient for aquatic plants. Phosphorus is often a limiting factor in plant growth, especially in tanks with a heavy plant load and minimal fish.

Key features:

Phosphorus concentration: It contains 4,500 mg/L of phosphate in a form that is easily accessible for plants.
Role: Supports the development of plant leaves and roots by preventing phosphorus deficiency, which can cause stunted growth and yellowing of leaves.
Dosage: One capful (5 mL) for every 300 liters will raise phosphate by 0.05 mg/L. Adjust as needed based on your tank’s needs.
Use: Safe for all aquarium inhabitants when used correctly, and it is designed to be non-toxic to fish and invertebrates.

This product is often used in conjunction with other fertilizers in Seachem’s Flourish line, like Flourish Nitrogen and Flourish Potassium, to maintain a balanced nutrient profile in planted aquariums.