Hanna Marine Master HI97115C: a complete analysis laboratory for reef aquariums
Maintaining good water quality in a marine aquarium requires regular monitoring of numerous parameters. Between controlling KH, monitoring coral calcium consumption, and tracking nitrate and phosphate levels, the analyses can quickly become burdensome when multiple measuring devices are required. Hanna Marine Master HI97115C provides a particularly practical solution by combining the main analyses of seawater into a single photometer.
Designed specifically for themarine and reef aquariums, This device measures eight parameters essential to the biological balance of the aquarium. It allows monitoring of both the elements necessary for coral growth and the nitrogen compounds and nutrients likely to promote the appearance of unwanted algae.
Unlike traditional colorimetric tests, where the aquarist must visually compare the color of a sample with a color chart, the HI97115C uses a LED photometric measurement system. The device analyzes the color reaction obtained after the addition of reagents and directly displays a numerical value. This method limits differences in interpretation related to color perception and allows for more reproducible monitoring of parameters.
The Marine Master is suitable for both enthusiasts with a reef aquarium rich in SPS and LPS corals and aquarists looking for reliable equipment to monitor their marine aquarium. It is also suitable for professional aquarists, multi-aquarium setups, and marine biology applications.
8 essential parameters for accurately monitoring seawater quality
The main advantage of Hanna HI97115C multiparameter photometer Its versatility is key. With a single device, it becomes possible to monitor the eight main chemical parameters that influence the stability of a marine aquarium. Each method has its own measurement range and uses specific reagents to obtain results tailored to the concentrations typically found in seawater.
Measuring KH, calcium, and magnesium for coral growth
THE KH, or alkalinity, Alkalinity plays a major role in pH stability and coral calcification. Its consumption can vary considerably depending on the coral population, particularly in reef aquariums heavily populated with hard corals. The Marine Master measures alkalinity over a range of 0.6 to 20.0 dKH, with a resolution of 0.1 dKH. This display precision allows for monitoring variations and adapting inputs made using a Balling method or a calcium reactor.
THE calcium is also one of the essential parameters for the construction of hard coral skeletons. The HI97115C allows its concentration to be measured between 200 and 600 mg/L, This range is perfectly suited to the values typically sought in a reef aquarium. Regular calcium monitoring helps ensure that the intake adequately compensates for the aquarium's consumption.
THE magnesium It plays a role in the chemical balance of seawater and helps to limit the spontaneous precipitation of calcium carbonate. Its concentration can be measured between 1000 and 1800 mg/L, with a resolution of 5 mg/L. Monitoring these three parameters allows for a better understanding of the tank's mineral consumption and helps maintain conditions favorable to coral growth.
Controlling nitrates, phosphates and nitrites in marine aquariums
Nutrient management is another important step in maintaining a reef aquarium. Excessive concentrations of nitrates or phosphates can promote the growth of unwanted algae, while excessively low concentrations can also be problematic for certain organisms. The Marine Master allows you to closely monitor the evolution of nutrients in order to gradually adjust feeding, skimming or biological filtration methods.
For the nitrates (NO3), The photometer offers two measurement methods. The wide-range method covers concentrations of 4.0 to 75.0 mg/L and allows for the control of aquariums with relatively high nitrate levels. A narrow-range method, of 0.50 to 5.00 mg/L, It is also available for aquariums requiring monitoring of low concentrations. However, this requires specific accessories and reagents, sold separately and not included in the HI97115C case.
The measurement of phosphates (PO4) It covers a range of 0.04 to 0.90 mg/L, with a resolution of 0.01 mg/L. It is particularly useful for monitoring phosphate buildup in aquariums and tracking the effectiveness of phosphate-removing resins, macroalgae refugiums, or other nutrient reduction solutions. The photometer measures reactive phosphates detected by its colorimetric method, not the total phosphorus present in the water.
The Marine Master also allows you to measure the nitrites (NO2) at low concentrations. This analysis is particularly useful when starting a marine aquarium, during biological maturation, or when a nitrogen cycle imbalance is suspected. The method measures nitrous nitrogen (NO2-N) over a range of 20 to 200 µg/L, a unit that should be distinguished from a concentration directly expressed as NO2.
PH and ammonia analysis to protect fish and invertebrates
THE pH directly influences the chemical and biological balance of the aquarium. In seawater, its value naturally varies throughout the day, notably due to photosynthesis and gas exchange. The HI97115C measures pH over a range of 6.3 to 8.6, This allows for spot checks and the detection of any unusual variations. It is a measurement performed on a sample with a reagent, and not a probe intended for continuous pH monitoring.
L'ammonia is another important indicator of water quality. Its appearance can reveal a biological imbalance, excessive decomposition of organic matter, or a filtration problem. The Marine Master has a measurement method between 0.10 and 2.50 mg/L. Monitoring this parameter is particularly useful when starting an aquarium, after a major disturbance of the biological system, or when a problem affecting the fish is suspected.
A Bluetooth photometer connected to the Hanna Lab app
THE Hanna Marine Master HI97115C It doesn't just display results on its screen. Thanks to its integrated Bluetooth connectivity, it can communicate with a compatible smartphone or tablet using the app. Hanna Lab App. This feature greatly facilitates the monitoring of analyses, particularly for aquarists who wish to keep a detailed history of their aquarium parameters.
Once the device is connected, measurements can be transferred and saved in the app. This makes the data easier to view, compare, and share. It's also possible to add observations to contextualize the results, such as a recent water change, a modification of the Balling dosage, or the installation of a new filtration system.
The application also allows you to create tracking graphs and to organize the analyses by aquarium or sampling location. This option is particularly useful for setups with multiple tanks. It allows for easy retrieval of information without having to keep a measurement log or manually copy the results into a table.
The photometer also has a internal memory capable of storing 200 measurements, with the identification of 10 sampling locations directly on the device. The use of the Hanna Lab App expands storage and organization possibilities, with the management of up to 100 tanks or sampling locations.
Integrated tutorial mode: easy seawater analysis
The accuracy of a test depends as much on the quality of the instrument as on adherence to the analytical method. An incorrect quantity of reagent, insufficient reaction time, or an improperly cleaned cuvette can alter the result. To minimize these risks, Hanna Instruments equipped the HI97115C with a tutorial mode directly accessible from the screen.
This guide accompanies the user through each step of the analysis. It indicates the operations to be performed, the quantities of reagents required, and the various steps to take before starting the measurement. Each method has its own instructions, making it easy to switch from one parameter to another without having to constantly consult the manual.
This assistance offers a real ease of use, especially for aquarists new to photometric analysis. It also allows you to standardize the procedures when the same device is used by several people, while reducing the risk of forgetting during sample preparation.
LED optical technology designed for reliable and reproducible measurements
The Marine Master uses a advanced optical system with light-emitting diode (LED), combined with optical filters adapted to the different analysis methods. Depending on the parameter being measured, the device operates at a wavelength of 525 or 610 nm in order to determine the intensity of the color produced by the chemical reaction.
The principle is simple: a precise quantity of water is placed in a cuvette and then analyzed after preparation according to the selected method. The photometer measures the light transmitted by the sample and converts the result into a concentration directly readable on the screen. The values can be displayed in mg/L, µg/L, dKH or pH units, depending on the parameter in question.
The cuvette positioning system helps ensure reproducible measurement conditions. The photometer is also compatible with the function CAL Check, This allows users to verify the instrument's optical performance using specific calibration solutions, available separately. This verification provides an additional benefit for users who wish to regularly check the proper functioning of their device.
A compact, IP67 waterproof measuring device suitable for aquariums.
Water manipulation is naturally part of the daily routine for aquarists. Hanna Instruments therefore designed the HI97115C with a IP67 certified waterproof case, It is capable of withstanding dust and accidental immersion under the conditions specified by this certification. The device also has the unique feature of floating if it falls into water, making it easier to recover.
With dimensions of only 142.5 x 102.5 x 50.5 mm and a weight of approximately 380 g, This photometer is easily transportable between several aquariums. Its compact size also allows it to be easily stored in its protective case after analysis.
The food supply is provided by three 1.5V AA batteries, offering a claimed battery life of approximately 800 measurements without backlighting. An automatic shut-off function activates after 15 minutes of inactivity to conserve battery power. Battery operation is a significant advantage for taking measurements directly near aquariums, without needing a power outlet.
HI97115C: a complete kit with reagents to start your analyses
The version HI97115C corresponds to the complete Marine Master kit. Unlike the HI97115 version sold without a complete reagent kit, it is supplied in a carrying case This kit includes the instrument and the main components needed for the analyses. It is a particularly attractive solution for equipping oneself from the outset with several measurement methods, without having to select all the reagents individually.
The set includes the Marine Master photometer, two measuring cups with their caps, the reagents for the various analyses included, the accessories needed for the methods provided, a cleaning cloth for the cuvettes and the power batteries.
The reagents provided allow, in particular, for series of measurements of KH, ammonia, calcium, magnesium, nitrates in a wide range, nitrites, pH and phosphates. The narrow-range nitrate method is not included. : it requires the HI740273 accessory kit and HI781-25 reagents, available separately.
Once the reagents are used up, simply purchase refills corresponding to the parameters used. This design avoids replacing the entire device and allows purchases to be gradually adjusted to the actual frequency of testing. The cost of consumables can thus be controlled according to the needs of each aquarium.
Technical specifications and measurement ranges of the Hanna Marine Master HI97115C
THE Hanna HI97115C photometer The following measurement ranges are offered, specially selected for seawater analysis. The resolutions indicate the smallest increment displayed by the device; they should not be confused with the accuracy of the measurement.
| Setting | Measurement range | Resolution | Accuracy at 25°C |
|---|
| Alkalinity (KH) |
0.6 to 20.0 dKH |
0.1 dKH |
±0.3 dKH ±5% of reading |
| Ammonia (NH3) |
0.10 to 2.50 mg/L |
0.01 mg/L |
±0.05 mg/L ±5% of reading |
| Calcium (Ca) |
200 to 600 mg/L |
1 mg/L |
±6% of the reading |
| Magnesium (Mg) |
1,000 to 1,800 mg/L |
5 mg/L |
±5% of the reading |
| Nitrates (NO3), narrow range |
0.50 to 5.00 mg/L |
0.01 mg/L |
±0.25 mg/L ±2% of reading |
| Nitrates (NO3), wide range |
4.0 to 75.0 mg/L |
0.1 mg/L |
±2.0 mg/L ±5% of reading |
| Nitrites (NO2-N) |
20 to 200 µg/L |
1 µg/L |
±10 µg/L ±4% of reading |
| pH |
6.3 to 8.6 |
0.1 pH |
±0.2 pH |
| Phosphates (PO4) |
0.04 to 0.90 mg/L |
0.01 mg/L |
±0.02 mg/L ±5% of reading |
The main general characteristics of the Marine Master HI97115C are as follows:
- Manufacturer: Hanna Instruments.
- Model : Marine Master HI97115C.
- Kind : portable multiparameter photometer for seawater.
- Number of parameters: 8, with two methods for nitrates.
- Light source: LED.
- Wavelengths: 525 and 610 nm.
- Connectivity: Bluetooth with Hanna Lab app.
- Internal memory: 200 measurements.
- Internal identification: up to 10 sampling locations.
- Protection: IP67 waterproof rating and floating housing.
- Toilet bowls: glass, outer diameter 24.6 mm.
- Food : 3 AA 1.5V batteries.
- Autonomy: approximately 800 measurements without backlighting.
- Automatic shut-off: after 15 minutes of inactivity.
- Terms of use: 0 to 50 °C, maximum relative humidity of 95%.
- Dimensions: 142.5 x 102.5 x 50.5 mm.
- Weight : 380 g.
Compatible Hanna reagents and consumables for the Marine Master HI97115C
To continue using the photometer after the supplied reagents have been used up, Hanna Instruments offers charging kits specific to each parameter. These consumables are designed to work with the methods programmed in the Marine Master and must be used in accordance with the instructions displayed on the device.
- HI772-26: KH alkalinity reagents, 25 tests.
- HI784-25: reagents for ammonia in seawater, 25 tests.
- HI758-26: reagents for calcium, 25 tests.
- HI783-25: Magnesium reagents, 25 tests.
- HI782-25: Reagents for nitrates in a wide range, 25 tests.
- HI781-25: Narrow range nitrate reagents, 25 tests with filter papers.
- HI764-25: reagents for low concentration nitrites, 25 tests.
- HI780-25: pH reagents for seawater, 100 tests.
- HI774-25: reagents for low concentration phosphates, 25 tests.
For the narrow-range nitrate method, the accessory kit HI740273 is also required. It is not supplied with the HI97115C and must be ordered separately, as must the HI781-25 reagents.
Maintenance and replacement accessories are also available to extend the photometer's lifespan and maintain optimal measurement conditions. In particular, the cuvettes must remain perfectly clean, as fingerprints, salt deposits, or scratches can disrupt light transmission and affect the results.
- HI97105-11: CAL Check standard solutions compatible with the Marine Master HI97115.
- HI731318: Cleaning cloths specially designed for toilet bowls, pack of 4.
- HI731331: replacement glass measuring cups, set of 4.
- HI731336N: Replacement toilet bowl caps, pack of 4.
- HI93703-50: Toilet bowl cleaning solution, 250 ml bottle.
How do I maintain the Hanna Marine Master photometer to ensure accurate measurements ?
Regular maintenance of the Hanna Instruments HI97115C is essential to maintain the reliability of the analyses. Even though the device is designed to withstand the conditions of use encountered in aquariums, a few precautions will help to maintain consistent and reproducible results over time.
The first rule concerns the measuring bowls. They must be thoroughly rinsed after each analysis to remove reagent residue and prevent cross-contamination. Before placing a cuvette in the photometer, it is important to check for fingerprints, water droplets, or deposits on its outer surface. Using a suitable cloth allows you to clean the glass without scratching it.
It is also advisable to respect the reaction times indicated by the tutorial mode and to use only compatible reagents, stored under the conditions recommended by Hanna Instruments. Expired or improperly stored reagents can lead to incorrect results, even when the photometer is functioning perfectly.
For users who wish to regularly check the performance of their device, the CAL Check HI97105-11 standard solutions They constitute a useful complement. They allow for checking the optical system and ensuring that the photometer operates within the tolerances specified by the manufacturer.
Finally, after each use, the Marine Master can be stored in its protective case, Protected from dust, excessive humidity, and salt water splashes. Its compact size makes it easy to store and protects the accessories needed for future analyses.
Why choose the Hanna HI97115C for monitoring a reef aquarium ?
In a reef aquarium, the stability of parameters often matters more than a single value. A gradual drop in KH, increased calcium consumption, or a rise in phosphates can go unnoticed if tests are infrequent. Thanks to the Marine Master HI97115C, controls become simpler to organize and the results can be kept to monitor the evolution of the aquarium over several weeks or months.
The combination of eight measurement parameters, an LED optical system, an integrated tutorial, and Bluetooth connectivity This device offers a particularly comprehensive solution for aquarists wishing to centralize their analyses. It eliminates the need for multiple individual photometers and allows users to access the main seawater testing methods in a single piece of equipment.
Regular monitoring of KH, calcium, and magnesium is particularly useful for adjusting the inputs of a Balling method or a calcium reactor. Meanwhile, nitrate and phosphate measurements facilitate nutrient management and allow for a better understanding of the effects of feeding, water changes, and different filtration methods.
THE Hanna Marine Master HI97115C It is therefore suitable both for aquarists who wish to replace several traditional tests and for enthusiasts looking for a portable, connected device capable of providing easily usable digital results. With its included reagents, carrying case, and numerous analysis methods, it offers a versatile solution for monitoring essential marine aquarium parameters.
