• Seachem Reef Phosphorus 250 mL bottle used to raise phosphorus levels in reef aquariums
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Seachem Reef Phosphorus 250 mL

Seachem Reef Phosphorus 250 mL

Seachem Reef Phosphorus is a concentrated phosphorus (PO₄³⁻) supplement designed for reef aquariums experiencing ultra-low nutrient levels. While excess phosphate can cause algae issues, too little phosphorus can starve corals, leading to pale coloration, slowed growth, and reduced polyp extensionespecially in SPS-dominant and ULNS systems.

This supplement allows reef keepers to precisely raise phosphorus levels to support healthy coral metabolism, coloration, and growth without introducing unwanted contaminants.

The 250 mL bottle is ideal for home reef aquariums and controlled nutrient dosing.

Controlled Phosphorus Supplement Prevents Nutrient Starvation Reef-Safe Formula

Key Benefits

🧪 Prevents Phosphorus Deficiency in ULNS & SPS systems
🪸 Supports Coral Growth & Coloration
🎯 Highly Concentrated for Precise Dosing
Designed for Reef & Marine Aquariums
🐠 Safe for Fish, Corals & Invertebrates
⚖️ Helps Balance Nutrient Ratios (N:P)

⚙️ Product Details

  • Brand: Seachem
  • Product Name: Reef Phosphorus
  • Size: 250 mL
  • Supplement Type: Phosphorus (Phosphate source)
  • Aquarium Type: Saltwater / Reef
  • Best For:
  • SPS-dominant systems
  • Ultra-low nutrient systems (ULNS)
  • Reef tanks with pale or slow-growing corals

💡 Dosing Guidelines (Summary)

  • 1 mL per 20 gallons raises phosphorus by approximately 0.02 ppm
  • Target phosphate level: 0.020.08 ppm
  • Test phosphate regularly before dosing

Always test water parameters and dose conservatively.

❓ FAQ Seachem Reef Phosphorus

Q: Why would I add phosphorus to my reef tank?
A: In ULNS systems, phosphorus can drop too low, causing coral starvation and color loss.

Q: Is this the same as adding phosphate remover?
A: Nothis product adds controlled phosphorus, not removes it.

Q: Can this cause algae growth?
A: Overdosing can contribute to algae; proper testing and dosing prevents this.

Q: Is this safe for mixed reefs?
A: Yessafe when used correctly for SPS, LPS, soft corals, fish, and invertebrates.

Q: Do I need a phosphate test kit?
A: Yesaccurate testing is essential for proper dosing.

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