Seachem Flourish Phosphorus 4L

Seachem Flourish Phosphorus is a safe phosphorus supplement for planted aquariums. It lets you dose phosphate to match your plants’ needs without adding nitrate, so you can correct a phosphorus shortage on its own and keep growth balanced. This bottle holds 4L.

Key features of the Seachem Flourish Phosphorus 4L

• 4,500 mg/L phosphate
• Nitrate-free
• Corrects phosphorus shortage
• Size: 4L

Dosing guide

Seachem’s starting dose is 2.5ml, half a cap, per 80 litres once or twice a week, or as needed when plants show signs of phosphorus shortage such as stunted growth or unusually dark green leaves. That dose raises phosphate by about 0.15 mg/L, and Seachem suggests most planted tanks sit somewhere between 0.15 and 1.0 mg/L, so check with a phosphate test such as MultiTest Phosphate before adding more. It is safe for shrimp and other invertebrates. The 4L size makes most sense for large planted aquariums or for keepers dosing several tanks.

Good to know

Test phosphate before dosing and add small amounts, as excess phosphate can encourage algae.

Seachem Flourish Phosphorus 4L specifications

• Brand: Seachem
• Brand website: seachem.com
• Product: Seachem Flourish Phosphorus 4L
• Size: 4L
• Category: Fish Health & Wellness