The Aquascape IonGen System G2 helps control string algae, but existing algae does not disappear immediately. Depending on algae growth and water conditions, noticeable results may take several days to a few weeks.
If string algae continues growing, check the following conditions before increasing the ionization setting.
1. Remove existing string algae
- Manually remove as much string algae as possible.
- The IonGen System helps control new algae growth but does not immediately eliminate existing algae.
- Allow several days to a few weeks for noticeable improvements.
2. Check the ionization setting
- Make sure the IonGen System is powered on.
- Press and hold the + or – button for 3 seconds to enter adjustment mode.
- Gradually increase the setting only if string algae growth remains excessive.
- Monitor copper concentrations using the Aquascape Copper Test Kit – Item #96020.
Important: Copper concentrations must not exceed 0.25 ppm (0.25 mg/L) in ponds containing fish. If copper reaches this level, reduce the ionization setting.
Higher settings do not necessarily improve algae control. Some water conditions prevent the controller from reaching higher settings, such as levels 7–10. This does not automatically indicate a malfunction.
3. Inspect and clean the IonGen Probe
Scale buildup, debris, or worn probe bars can reduce the effectiveness of the IonGen System.
- Disconnect power to the IonGen System.
- Remove the IonGen Probe and inspect the metal bars.
- Gently brush or scrape away scale and debris.
- Replace the probe if the bars are significantly worn.
- Reinstall the probe and restore power.
Replacement product: IonGen G2 Probe – Item #95028.
The IonGen Probe must remain fully submerged during operation.
Note: If the controller displays "OL," the probe may be exhausted or there may be a system fault. Inspect the probe and connections for damage.
4. Check water circulation
The IonGen System requires sufficient water flow across the probe to distribute copper ions effectively.
- Make sure the probe is fully submerged and exposed to moving water.
- Check for restricted flow through the IonGen flow chamber.
- If scale repeatedly builds up on the probe, consider relocating it to an area with better circulation.
- For best performance, install the flow chamber directly into the pond's recirculating plumbing system.
Related product: IonGen G2 Probe Holder – Item #95077.
The probe holder allows the IonGen G2 Probe to be positioned in a suitable location without using the flow chamber.
Poor circulation can reduce algae control even when the ionization setting is increased.
5. Test pond water chemistry
Water chemistry significantly affects IonGen System performance.
Recommended water parameters:
- Total alkalinity (KH): 100–250 ppm (100–250 mg/L).
- Copper concentration: Below 0.25 ppm (0.25 mg/L) in ponds containing fish.
Use the following Aquascape products to monitor water conditions:
If total alkalinity is below 100 ppm (100 mg/L), increase it to the recommended range before operating the IonGen System in a pond containing fish.
Aquascape Alkalinity Booster with Phosphate Binder can help raise low alkalinity.
If alkalinity exceeds 250 ppm (250 mg/L), a partial water change may help reduce it. Check the alkalinity of the replacement water before adding it.
Important: A low or undetectable copper reading does not necessarily indicate a malfunction. Copper ions may be used within the water feature. Monitor string algae growth rather than continually increasing the ionization setting to achieve a measurable copper reading.
6. Identify the type of algae
The IonGen System is designed primarily to control string algae attached to rocks, gravel, and other pond surfaces.
Other types of algae may not respond as effectively to ionization.
If increasing the setting does not improve algae control, the issue may be related to water circulation, probe condition, water chemistry, or the type of algae rather than the controller setting.
If string algae continues growing
If string algae continues growing after completing these checks and allowing several days to a few weeks for improvement, please submit a request through our Customer Care contact form.
For more information about the IonGen System, including product details, manuals, additional support resources and, warranty information, click here.
Not all Aquascape products are available in every country. Availability may vary due to regional requirements, local regulations, and other market-specific conditions. In some cases, products may be marketed under different names based on imperial or metric measurements, or due to country-specific product naming regulations and labeling requirements.
To determine which products are available in your region, please visit the product pages specific to your country on the Aquascape site.