Salifert Phosphate Test Kit — Reef-Grade Titration for Marine Aquariums - Salifert

Salifert Phosphate Test Kit for reef marine aquariums

The Salifert Phosphate Test Kit is a laboratory-grade titration test kit, considered for 20 years the gold standard in reef aquarium testing. Unlike strip tests or low-end colorimetric kits, the Salifert method uses drop-count titration with a clean colour change — the result is numerical, reproducible test to test, and readable by eye without a photometer.

In practical use, this kit lets you monitor PO₄ on ULNS SPS reefs down to 0.01 ppm — essential to prevent SPS browning. Reef target 0.03-0.05 ppm.

What this kit brings to a reef keeper

• Precision: 0,01 ppm — plenty to drive a 2-part dosing routine or a Balling method.
• Range: 0.01 to 1 ppm PO₄.
• Number of tests: 50 tests per kit — a typical 6-month to 2-year cycle depending on frequency.
• Clean-colour-change titration — no subjective visual reading like on colorimetric kits.
• Instructions, dosing syringe and test vials included.
• Lab method adapted for home use — the same one used by professional aquarium stores.

How to use

• Rinse the vial with RO water and sample water.
• Draw the sample volume specified for the parameter.
• Add reagents A/B following the procedure.
• Titrate drop-by-drop with the syringe until the colour turns.
• Read the result on the conversion table provided.

Specifications

• Parameter: Phosphate
• Measurement range: 0.01 to 1 ppm PO₄
• Resolution: 0,01 ppm
• Number of tests: 50 tests per kit
• Method: drop-count titration
• Compatibility: reef and marine aquariums
• Storage: dry, room temperature, out of direct sunlight.

Why get this kit from ReefSolution

To build a complete reef testing station we also recommend:

• Salifert KH / Alkalinity Test Kit — the reef parameter that shifts fastest; measure twice a week.
• Salifert Calcium Test Kit — completes the Ca/KH/Mg trinity.
• Salifert Magnesium Test Kit — measure every 2-4 weeks to prevent KH/Ca precipitation.
• Salifert Phosphate Test Kit — 0.01 ppm precision on ULNS SPS reefs.

Frequently asked questions

How many tests does a Salifert Phosphate kit provide?

50 tests per kit — a typical 6-month to 2-year cycle depending on how often you monitor the tank.

Is Salifert more accurate than Red Sea or API tests?

Salifert uses drop-count titration with a clean colour change, more accurate and more reproducible than low-end colorimetric kits. Typical precision: 0,01 ppm.

How often should I test phosphate on a reef aquarium?

On an established SPS tank: 1-2 times per week for KH, Ca and Mg; once a month for stable parameters (PO₄, NO₃, Mg if dosing is stable); as needed for Cu, Sr, K, I.