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ZOANTHUS LAB – KH + 1000 ml: precise alkalinity correction in reef aquariums
KH + Zoanthus Lab 1000 ml is a concentrated solution designed to precisely correct alkalinity in marine aquariums. KH is a fundamental parameter for reef balance, directly linked to pH stability and the proper functioning of calcification processes in hard corals, calcareous algae, and other reef-building organisms. Formulated with purified water , pharmaceutical-grade sodium carbonate , and pharmaceutical-grade sodium bicarbonate , this product guarantees a clear, stable, and perfectly measurable solution. Free of unnecessary additives, it is ideally suited for rigorous management based on ICP analysis. A reliable, transparent solution designed for discerning aquarists.
- Targeted correction of KH deficiencies after ICP analysis
- Simple, progressive and easily reproducible dosage
- Pure formulation, without stabilizers or complexing agents
- Each batch is tested in our laboratory before being sold.
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The role of KH in a reef aquarium
KH, or carbonate alkalinity , is one of the most closely monitored parameters in reef aquariums. It represents the water's ability to buffer pH fluctuations and plays a central role in the overall chemical stability of the tank. Consistent alkalinity promotes a more stable environment for corals, especially for species with high calcification growth.
In a marine aquarium, KH is continuously consumed by biological processes and calcification. A gradual decrease can slow the growth of hard corals, compromise pH stability, and make it difficult to maintain a lasting balance between calcium, magnesium, and alkalinity. Precise adjustment is therefore essential in any demanding reef tank.
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 – KH+ solution is prepared from a mixture of sodium carbonate ( Na2CO3 ) and sodium bicarbonate ( NaHCO3 ) , dissolved in purified water.
The chosen protocol is based on a 70% carbonate / 30% bicarbonate ratio, offering an excellent compromise between concentration [oaicite:1] stability {index=1} and gentle action on pH. The use of pharmaceutical-grade raw materials ensures a clean, consistent solution suitable for rigorous reef supplementation.
- ✔ Stable alkaline solution
- ✔ Chelator-free
- ✔ Compatible with Balling and other reef methods
- ✔ Gentler effect on pH than a 100% carbonate formula
Concentration and dosage
The solution is formulated according to a precise protocol:
- Recommended dosage: 10 mL per 100 L of water
- Effect: +1 dKH
- Gradual correction: do not increase by more than 1 dKH per day
- Practical guideline: 1 mL per 100 L of water = +0.1 dKH
- Practical formula: mL to dose = tank volume (L) × target increase (dKH) ÷ 10
Supplementation should always be based on a recent ICP analysis or reliable measurements. To [oaicite:2] rapid fluctuations, large adjustments should be spread over several applications. This approach {index=2} maintain tank stability while avoiding excessive pH fluctuations.
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 and moisture, between 15 and 25°C, in a tightly sealed container. The protocol also recommends protecting the product from moisture to preserve the stability of the preparation. :contentReference [oaicite:3] {index=3}
- 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 parameter, 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.
Product Details
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ZOANTHUS LAB - Kh+ - 1000ml