Salifert KH/Alkalinity Aquarium Test Kit
SKU: SF-KHPT
- The Salifert KH/Alkalinity Profi-Test is a titration-based alkalinity test kit for reef and saltwater aquariums.
- It measures alkalinity in 0.1 meq/L (0.3 dKH) increments, providing the resolution needed to catch meaningful fluctuations before corals are affected.
- Each kit contains reagents for approximately 100 tests, with some kits yielding up to 200 depending on use.
- Results are reported in both meq/L and dKH, covering the two scales most commonly referenced by reef hobbyists.
Salifert
Precision test kits trusted by reefers worldwide. Known for accurate, easy-to-read results for all critical reef and freshwater parameters.
Alkalinity Test Kit for Reef and Saltwater Aquariums
The Salifert KH/Alkalinity Profi-Test is a titration kit used to measure carbonate hardness and alkalinity in marine aquariums. Alkalinity is a key parameter in reef tanks, along with calcium and magnesium, affecting coral growth, pH stability, and water buffering. Salifert's test kits are popular in the reef hobby because they are accurate and show clear color changes, making it easy to get reliable results.
The kit measures in steps of 0.1 meq/L or 0.3 dKH, which helps detect small, important changes in a stable reef. A change of 0.4 dKH (0.14 meq/L) or more can impact coral health, and less precise kits may miss these small shifts. Each kit allows for about 100 tests, suitable for weekly or twice-weekly checks.
Key Features:
- Titration-based test method produces accurate, repeatable results with a clear color endpoint.
- Measures in 0.1 meq/L / 0.3 dKH increments for the resolution needed to track meaningful alkalinity fluctuations.
- Results reported in both meq/L and dKH to match whichever scale your dosing system or reference uses.
- Approximately 100 tests per kit (up to 200 possible depending on use).
- Trusted by reef hobbyists for consistent performance across saltwater and reef applications.
Ideal For:
- Reef tanks with SPS, LPS, or mixed coral where alkalinity stability is a primary maintenance priority.
- Hobbyists running two-part dosing, calcium reactors, or kalkwasser who need reliable baseline measurements to dial in addition rates.
- Any saltwater tank keeper who tests alkalinity on a weekly or twice-weekly basis and wants a consistent, proven test method.
Why Alkalinity Matters?
- Alkalinity (KH or carbonate hardness) is the measure of carbonate and bicarbonate ions in the water that form the buffering system keeping pH stable and supplying the raw material corals use to build their calcium carbonate skeletons. In a reef tank, alkalinity is consumed continuously by coral growth and by the natural CO2 cycle. Without regular testing and replenishment, it drops silently — often faster than calcium — and unstable alkalinity is one of the most common causes of coral tissue loss and growth stalls in otherwise well-kept systems.
- Salifert recommends maintaining alkalinity between 2.8–3.2 meq/L (7.8–9 dKH) for most reef tanks, and avoiding fluctuations greater than 0.4 dKH between tests.
Pro Tips:
- Test at the same time each day. Alkalinity naturally fluctuates slightly with the light cycle due to photosynthesis and respiration. Testing at a consistent time — typically morning before lights come on — gives you the most comparable baseline across tests.
- Test alkalinity before adjusting your dosing. If you're running two-part or a calcium reactor, always test first and dose to a known target, not to a general schedule. Salifert's 0.1 meq/L resolution makes this practical even for small corrections.
- Keep the kit away from heat and direct sunlight. Salifert reagents are sensitive to temperature and UV exposure. Store the kit in a cabinet or drawer, not on the tank stand or a shelf above the sump. Degraded reagent is the most common cause of inconsistent results with otherwise reliable test kits.
What's Included:
- KH/Alkalinity Profi-Test reagents
- Syringe/titrant
- Test vial
Specifications:
- Test Method: Titration
- Parameters Measured: KH (dKH) and Alkalinity (meq/L)
- Measurement Increments: 0.1 meq/L / 0.3 dKH
- Recommended Range: 2.8–3.2 meq/L / 7.8–9 dKH (reef)
- Number of Tests: ~100 (up to 200 possible)
- Application: Saltwater / reef aquariums
While most of our equipment carries a one-year manufacturer's warranty, consumable products like fish and coral foods are not covered under traditional warranty terms due to their perishable nature and varied storage conditions. However, we fully stand behind the quality of every product we sell. If you experience any issues with your food purchase shortly after receiving it, such as concerns about freshness, packaging integrity, or product quality, please contact us at [email protected]. We're committed to making it right and will work with you to resolve any problems quickly and fairly.
For best results, follow the instructions included with your kit. Salifert's step-by-step guide is printed for your specific reagent batch and is the most reliable reference for accurate testing.