The Aquascape IonGen System uses copper ions to help control string algae in ponds and decorative water features. Copper levels must be monitored regularly to ensure effective algae control and protect fish and other aquatic life.
The copper concentration must remain below 0.25 parts per million (ppm), equivalent to 0.25 mg/L. Never allow copper levels to exceed this limit.
How to test copper levels
Use the copper test kit included with the IonGen System or a suitable replacement copper test kit.
Collect a pond water sample and follow the instructions provided with the test kit.
Compare the test results with the kit's color chart to determine the copper concentration in ppm.
Confirm that the copper concentration remains below 0.25 ppm.
Continue testing periodically to ensure copper levels remain within the recommended limit.
Important: When starting the IonGen System or increasing the ionization setting, test the water over several days to monitor changes in copper concentration.
How to maintain the correct copper levels
The IonGen System's ionization setting controls the amount of copper ions released into the water.
For new ponds or ponds with minimal algae: Start the IonGen System at level 1 or 2.
If string algae increases: Gradually increase the ionization setting while monitoring copper levels.
Once algae is controlled: Reduce the ionization setting to the lowest level that maintains effective algae control.
If copper approaches 0.25 ppm: Lower the ionization setting to prevent copper levels from increasing further.
Operating at lower ionization settings also helps extend the life of the IonGen Probe.
What if copper levels are too high?
If the copper concentration reaches or exceeds 0.25 ppm:
Reduce the IonGen System to level 1 or unplug the controller.
Allow copper levels to decrease below 0.25 ppm before resuming normal operation.
If copper levels are significantly elevated, perform a partial water change to help reduce the concentration.
Retest the water to confirm that copper levels have returned below the maximum limit.
Resume operation at a lower ionization setting and continue monitoring.
What if the copper test reads zero?
A low or zero copper reading does not necessarily mean the IonGen System is malfunctioning.
Copper ions may be consumed or used within the water feature, resulting in little or no measurable copper even when the system is operating.
Monitor the amount of string algae growing in the pond.
If algae is being controlled, a low copper reading may be normal.
Do not continually increase the ionization setting simply to obtain a measurable copper reading.
Continue periodic copper testing to ensure concentrations remain below 0.25 ppm.
Additional water chemistry considerations
For optimal IonGen System performance, Aquascape recommends the following water parameters:
Copper: Below 0.25 ppm (0.25 mg/L).
Total alkalinity: 100–250 ppm (100–250 mg/L).
Alkalinity affects the effectiveness of copper ions and the IonGen System's operation.
Important: Do not operate the IonGen System in a pond containing fish if total alkalinity is below 100 ppm (100 mg/L).
During colder months when algae growth stops, Aquascape recommends shutting down the IonGen System to help prevent unnecessary copper accumulation and extend probe life.