ZOANTHUS LAB - Iron - 250ml

The role of iron in reef aquariums

Iron is an essential trace element present in trace amounts, generally expressed in µg/L. In reef aquariums, it is often monitored via ICP analysis because it can be consumed quickly and vary depending on skimming, export, filtration and the density of life in the tank.

Properly maintained iron levels contribute to the proper functioning of the microfauna and certain biological pathways. The goal is to correct deficiencies only when they are confirmed , and then stabilize them through gradual and controlled supplementation.

We offer a full range of products to target the main elements of seawater following ICP analysis or manual testing.

A simple, direct and controlled formulation

The Zoanthus Lab – Iron solution is prepared from iron(II) sulfate heptahydrate ( _FeSO4 · _7H2O ) , dissolved in purified water (RO/DI), with the addition of a stabilizer.

Iron(II) can oxidize naturally over time. To improve stability, the formulation includes a stabilizer (sodium citrate dihydrate) . The raw material used is pharmaceutical grade to ensure a clean, stable, and reproducible composition.

• ✔ Stable formula with stabilizer
• ✔ Precise, simple and reproducible dosage
• ✔ Compatible with Balling, Triton method and other reef methods
• ✔ Consistent and reproducible ICP results

Concentration and dosage

The solution is formulated according to a precise protocol:

• Concentration: 0.4 mg/mL of iron (elemental Fe)
• Recommended dosage: 1 mL per 100 L of water
• Effect: +4 µg/L of iron
• Correction limit: do not increase iron by more than 1 µg/L per day.

Supplementation should always be based on a recent ICP analysis . Regular monitoring allows for precise adjustments, avoiding overdosing, while maintaining a stable tank in the long term.

Zoa Aqua Manager: your smart dosing assistant

Each Zoanthus Lab product can be controlled via our free Zoa Aqua Manager calculator. In just a few seconds, you get a precise and personalized dosage from your ICP analysis (Zoanthus Labs or any other laboratory).

No more manual calculations: enter your water volume, your measured value and your objective, and the system automatically calculates the appropriate correction, with the possibility of progressive dosing for optimal stability.

A tool designed by aquarists, for demanding aquarists.

Three ICP analyses tailored to each need

ICP REEF

The essentials for reef aquariums

Complete analysis of the major elements and trace elements essential for the regular monitoring of your reef aquarium.

• Key parameter tracking
• Detection of deviations
• Over 40 parameters analyzed

ICP MAX

Ultra-comprehensive diagnosis

In-depth reading with expanded spectrum including fluoride, nitrates, KH and reverse osmosis water analysis.

• Most detailed analysis
• Over 45 parameters analyzed + reverse osmosis water
• For discerning aquarists

ICP PURA

Special reverse osmosis water

Precise control of your preparation water to ensure a perfectly healthy base before any remineralization.

• RO/DI water verification
• Contaminant detection
• Secure the preparation

The results of each analysis can be directly used in our free Zoa Aqua Manager calculator for precise and personalized dosing.

Usage and storage instructions

Add to a well-circulated area of the aquarium or to the sump. Shake well before use.

Store away from light, between 15 and 25 °C. Recommended shelf life: 12 months after manufacture.

• Product intended exclusively for use in aquariums!
• Keep out of reach of children! Do not swallow! Do not ingest.
• Not suitable for animal feed.
• In case of contact with skin or eyes, rinse thoroughly with water.

As with any trace element, excessive supplementation is unnecessary and can unbalance the water. Regular monitoring via ICP analysis remains the most reliable method for maintaining a stable aquarium in the long term.