The upkeep of Alkalinity is the most important aspect of reef keeping, stability is key. If you’re looking to achieve exceptional coral growing conditions, Alkalinity testing is a must!
Keep it steady with the new KH Director. Monitor, maintain and control Alkalinity with ease.
KH Director® – Features
Lab-grade KH measurement accuracy
Measure your Alkalinity with lab-grade accuracy. With only a 100 ml water sample, KH Director® can provide measurement values with 0.1° dKH accuracy.
User-adjustable test sample volume
In practice, an accuracy of 0.1° dKH is not always necessary. KH Director offers the option to reduce the test sample volume for each test. An accuracy of approx. 0.2° dKH can still be achieved with a smaller water sample.
Measurements per day adjustable
If the KH value does not fluctuate strongly the number of measurements can be reduced.
Higher accuracy and safety provided by additional valves
Test your Alkalinity with confidence and consistency. Built-in valves ensure exactly the same measurement conditions and prevent the sample liquid from flowing back into the aquarium, even in the unlikely event of a fault.
Cost-effective and safe reagent fluid
Each test requires only 1 – 3 ml per measurement.
Examine past test results, catch sudden KH swings, and fine-tune your KH dosing with help from automated data logging.
Automated liquid supply
Automatic supply of KH-boosting liquids. Depending on the method one or more additional dosing pumps required.
How does the KH Director® work?
The KH Director® is designed to work in conjunction with a GHL Doser 2 (2.1) Standalone or a ProfiLux® Aquarium Controller 3 or 4 with a Doser 2 (2.1) Slave for operation.
The 2 inlets and 1 outlet of the KH Director connect to 3 dosing pumps on the Doser 2 (2.1). These 3 pumps are then responsible for accurately transferring fluid to and from the KH Director.
A sample of the aquarium water is first sent to the KH Director®. Subsequently, the KH value is determined precisely with slow addition of a further liquid (reagent) and measurement of the pH value.
The sample water is then pumped out again and collected in a separate container for later disposal.
What are the costs for reagent and pH electrode?
Here at GHL we understand the importance of on-going costs involved with automated KH monitoring and control. For the KH Director it was especially important to consider these costs and develop a highly-efficient, cost-effective product. A single 1000ml bottle of reagent can last for up to 3 months when testing is performed 4x per day at a KH value of 8. The pH electrode used by the KH Director was specially designed for KH measurement and has an average lifespan of 1 – 2 years.
Controlling the KH value
KH Director® offers the most comprehensive methods and most adjustment options for the control of the KH value, and is thus suitable for different systems, eg. Balling® (Light), Triton® or kalkwasser reactor.
Depending on the difference between the target value and the current value of KH (= control difference), appropriate activities for increasing the KH value are started.
Choose the optimal mode for your aquarium and customize it individually.
The following modes are offered:
Add-on control mode
Use between 1 and 5 dosing pumps to add liquids to the aquarium depending on the control difference, KHD automatically calculates the appropriate quantities. The dosages can be time-delayed if the liquids are not to be dosed at the same time and divided into several sub-quantities per day. It is also possible that the dosing pumps used follow a dosing schedule, the quantities calculated by the KHD are then added to this dosing schedule.
Adaptive control mode
In this mode, 1 to 5 dosing pumps can also be used to add liquids to the aquarium depending on the control difference. In this mode, you set a dosing schedule for the dosing pumps involved, and the quantities of the dosing plan are varied by the KHD. If the KH value is correct, the dosing schedule remains unchanged, if the KH value is too low, all quantities of the dosing plan are increased as a percentage. If the KH value is too high, the quantities are reduced. The quantity change is dependent on the control difference and is calculated automatically.
Calcium reactor control mode
In this mode, a calcium reactor can be down-regulated depending on the KH value.
A calcium reactor is usually operated by CO2 addition and control of the pH value; the actual pH value in the calcium reactor is measured by a pH electrode. If you select this pH electrode in the KH Director Options, the KHD can switch off CO2 if necessary (KH target value reached), otherwise the normal CO2 control is activated. This mode is only possible with a ProfiLux aquarium computer.