The role of potassium in reef aquariums
Potassium is a major element naturally present in seawater , with an average concentration of approximately 380 to 400 mg/L. It plays an essential role in cellular mechanisms, osmotic regulation and ion transport within coral tissues.
In a reef aquarium, biological growth, removal via skimming, and certain supplementation methods can gradually lead to a decrease in potassium. A prolonged deficiency can impact the coloration of some corals (especially SPS) and the overall ionic stability of the system.
We offer a full range of products to precisely target the major elements of seawater following ICP analysis or manual testing.
A concentrated, pure and reproducible formulation
The Zoanthus Lab – Potassium solution is prepared from pharmaceutical grade potassium chloride (KCl) , dissolved in purified water (RO/DI).
The concentration is defined according to a strict manufacturing protocol guaranteeing a content of 150 mg/mL of elemental potassium [oaicite:0] This formulation ensures a measurable correction and {index=0} perfectly compatible with ICP monitoring.
- ✔ Stable inorganic solution
- ✔ Chelator-free
- ✔ 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: 150 mg/mL of potassium (elemental K)
- Recommended dosage: 1 mL per 100 L of water
- Effect: +1.5 mg/L of potassium
- Gradual correction: do not increase by more than 50 mg/L per day
Supplementation should always be based on a recent ICP analysis . In case of a significant deficiency, dividing the intake over several days helps to preserve the overall ionic stability of the tank.
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
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:contentReference [oaicite:1] {index=1} .
- 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 major element, excessive supplementation is unnecessary and can unbalance the water. Regular monitoring via ICP analysis remains the most reliable method for maintaining a stable tank in the long term.
