ION Director Initial Setup (Part 3)

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ION Director, Black

About this article

This article (part 3 of 3) will show you how to properly setup and configure the ION Director for automatic measurement. In order for the IOND to provide accurate test results, these steps must be followed exactly as shown.

Download the manual

In order to get the best understanding of how the ION Director is setup and how it works, we highly recommend you read the manual.

Click here to download the manual.

Prerequisite: Complete IOND Setup PART 1 and 2

Before you proceed with the steps below, you should first complete part 1 and part 2 of the IOND setup. If you have not done so yet, click the link below:

ION Director Initial Setup (Part 1)
ION Director Initial Setup (Part 2)

PART 3: Completing initial setup

In this section we will show you how to:

  • Enable the ION Director
  • Assign pumps to IOND
  • Setup IOND general settings
  • Install the MUI sensor
  • Prepare for first IOND test

— Enable ION Director

1. Open the GHL Connect app, press the Menu icon, select Control, then select ION Director


2. Enable the ION Director, then press SAVE

— Setup general settings for IOND

1. Enable Record measurement values (as shown)

NOTE: This will store your IOND test results so you can later view them on a chart (myGHL required)

2. In the Pumps for measurement section, select the dosing pumps that will be responsible for each task

Example: In part 2 of the initial setup, we chose pump 1 for the water sample, pump 2 for reference A and pump 3 for reference B

3. In the Time schedule section, specify how many times per day you want the IOND to test

You can have the IOND automatically test anywhere between 1 – 24 times per day. If you choose to test more than once per day, the testing intervals will be evenly split throughout the day.

Example: If you test 4x per day, each test will be 6 hours apart.

4. Specify at what time you want the first test of the day to take place

Example: If you test 4x per day and the first test begins at 12:00 AM, the next tests will be 6AM, 12PM, 6PM. (00:00, 6:00, 12:00, 18:00, respectively)

— Setup water sample settings

1. In the Sample tube volume field, press the Calculator icon

About water sample calculator

The calculator tool is used for telling the IOND how many ml the water sample tube holds. By measuring the total length of your water sample tube, the calculator will determine the volume held within the tube.

Alternatively, you can find the total tube volume by manually filling both ends of the tube with water and emptying the contents into a measuring instrument. If you choose to use this method, make sure you disconnect the tube from the IOND BEFORE manually filling and draining the tube.

2. Since you are using the sample tube that was included with your IOND, you can leave this field as-is.

NOTE: 4mm is the ID of the Flex-PVC tube that is included with the IOND.

3. Select your unit of measurement and type-in the total length of your water sample tube

How to measure water sample tube length
The total tube length consists of 3 pieces of tube. These are:

  • Length of tube from sump to pump head
  • Length of tube from tube inside pump head (Approx 4.7″ or 12cm)
  • Length of tube from KHD to pump head

When measuring the length of the tube going into the sump or aquarium, include the length of the water sample filter in your measurement.

4. Select this option to include the water sample filter in the total tube volume

5. Press APPLY

— Select a measurement mode

With the ION Director, you have the option to choose between two measurement modes; Standard mode or High Precision mode. The option you choose will depend on your particular set of needs and expectations.

Standard vs. High Precision mode: What’s the difference?

The IOND offers two measurement modes; Standard mode and High Precision mode. Both options follow a strict set of testing procedures which allow it to provide a level of precision (repeatability) not found in conventional test kits.

For the majority of users, standard mode will satisfy the needs of most users. The IOND in this mode already outperforms traditional test kits with a typical repeatability of +/- 3% or 3ppm (largest value).

For users wanting to achieve an even higher level precision, we offer a second option called High Precision mode. With this mode, the precision improves. HP mode allows for a repeatability of +/- 2% or 2ppm (largest value).

It is important to note that testing with HP mode will consume more sample water and reference fluids per test.

The table below will show you the difference between both measurement modes…

Normal modeHigh Precision mode
Reference fluid used per measurement9 ml13 ml
Sample water used14 ml21 ml
Measurement duration24 min30 min
Typical measurement accuracy (repeatability) to measured value+/- 3% respectively +/- 3 ppm (largest value)+/- 2% respectively +/- 2 ppm (largest value)
  1. Toggle this switch if you’d like to enable High Precision mode for all IOND measurements

— Setup IOND parameter monitoring and alarms

1. Press the Control and alarms tab

2. In the Nominal value fields, type-in your desired value for each parameter

3. Choose if you would like to activate Alarm monitoring for each parameter

If you choose to use this feature, specify the lower and upper limits. If a parameter falls outside of your specified range, an alarm will be triggered by your primary device.

4. If you would like to disable the IOND control when the alarm for a certain parameter is triggered, choose this option.

Optional step: Enable “Double-check” feature

The Double-check feature allows the IOND to perform an additional measurement IF the new results deviate by more than a certain amount when compared to the previous result. For example, if your last calcium result was 440 mg/L and the double-check feature is set to 40 mg/L, the IOND will perform an additional measurement IF the new measurement result was +/- 40 mg/L away from the last test result.

This feature comes in handy because if the IOND performs a measurement during a water change, auto top off or dosing event, the outlier results can be discarded after the re-test is completed. If you do not wish to use this feature, leave this field set to (0).

Double-check feature in-practice

Last IOND measurement (Calcium): 440 mg/L
Double-check: 40 mg/L

When the next measurement occurs, if the result is 400 mg/L or lower, the IOND will perform an additional measurement.
If the result is 480 mg/L or higher, the IOND will perform an additional measurement.

At the end of the re-test, if the results fall in-line with the previous measurement results, the IOND will automatically discard the outlier.

— Prepare MUI sensor

Now that the IOND basic settings are setup, it’s time to prepare the IOND sensor.

About sensor preparation

For optimal sensor performance, the active sensor tip (front, slotted area) must be soaked in water before it is connected to and used by the IOND.

1. Remove the foil or protective cap (if present) from the sensor tip; this keeps the sensor tip moist during transport

2. Place the sensor in a suitable container and slowly fill it with tap water or DI water (no saltwater!) until the front sensor slot is completely submerged (marked below as Min). Do not fill above Max line.

3. Allow the sensor to soak for at least 30 minutes before proceeding to the next step

— Install MUI sensor

With the sensor now prepared, you can connect it to the IOND and prepare it for its first measurement.

1. Loosen the IOND’s sensor locking nut by giving it just a few turns.

DO NOT unscrew the locking nut completely!

2. Insert the MUI sensor as shown in the illustration below

Take note of the guide grooves on the right and left of the sensor shaft. These grooves ensure correct positioning of the sensor.

3. Gently push in the sensor until it meets the stop-point.

DO NOT use force when inserting sensor!

4. Tighten the locking nut firmly.


When installing the sensor, make sure the locking nut is tight enough so you don’t have any leaks from the sensor fitting. If need be, use an appropriate tool (24mm wrench) to carefully tighten the nut.

An insufficiently tightened nut may also result in air entering the IOND measuring cell which will lead to poor measurement results! Premature aging of the sensor is also possible!

DO NOT apply excessive force when tightening otherwise you risk damaging the sensor and fitting!

5. Connect the MUI sensor to the MUI sensor port on the IOND.

— Prepare for first IOND measurement

After installing the MUI sensor, you can prepare the IOND for its first measurement.

1. In the Maintenance section, press PREPARE MEASUREMENT CELL

The assigned dosing pumps will now prime the measuring cell and internal tubes.

Wait 12 hours before starting the first measurement

After the measurement cell is prepared, you must give the MUI sensor 12 hours so it can stabilize with the provided liquids. Once these hours have passed, you can begin measuring at any time.

2. After 12 hours, you can trigger a manual measurement by pressing the Start measurement now button

OPTIONAL: Add IOND tile to Dashboard

Now that your IOND is setup, you can add the IOND tile to your Dashboard. Doing so will allow you to see the IOND’s last measurement results directly from the dashboard.

Click here for instructions on customizing your GHL Dashboard.

OPTIONAL: Add IOND results to Email notifications (ProfiLux 3 / 4E / 4 only)

If you would like to see your IOND’s last measurement results in your email notification, add the following token to your new or existing email body:


IOND measurement and auto-adjustment controls

Once you are comfortable with the measurement values provided by the IOND, you can take it a step further and use the device to automatically adjust your existing dose schedules.

Doing so will allow the IOND to continuously monitor your parameters and automatically make adjustments for you when necessary.

Click here for instructions on how to setup this feature.

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