1. Introduction
The Jebao STU-36 Stainless Steel Clarifier is designed to maintain clean and clear water in ponds and aquariums. This non-submersible unit utilizes a high-performance UV-C light bulb to clarify water, reducing green water and preventing odors. Its robust stainless steel construction ensures durability and efficient operation. This manual provides essential information for the safe and effective installation, operation, and maintenance of your STU-36 clarifier.
Image 1.1: The Jebao STU-36 Clarifier unit shown with its product packaging.
2. Safety Information
Please read and understand all safety instructions before operating the Jebao STU-36 Clarifier. Failure to follow these instructions may result in injury or damage to the product.
2.1 General Safety Precautions
- Direct exposure to UV-C radiation can be harmful to eyes and skin. Always verify the UV-C lamp operation through the transparent inlets on the unit, not by direct viewing of the bulb.
- Do not operate the device if any components are damaged, especially the quartz glass sleeve.
- Ensure water is flowing through the device before switching it on. Switch off the unit immediately if water flow stops.
- The power transformer is weather-resistant but should be protected from direct sunlight to maximize its lifespan.
- This product is intended for use with ponds and aquariums. Do not use it for purposes other than its intended design.
- Keep out of reach of children.
2.2 Electrical Safety
- Ensure the power outlet is properly grounded and protected by a Ground Fault Circuit Interrupter (GFCI).
- Do not modify the power cord or plug.
- Always disconnect power before performing any maintenance or installation.
- Do not immerse the transformer or plug in water.
3. Package Contents
Verify that all components are present and undamaged upon opening the package:
- Jebao STU-36 Clarifier Unit (Stainless Steel Housing with Black End Caps)
- 36-watt UV-C Lamp (Bulb)
- Quartz Sleeve
- External Transformer with 22 ft Power Cord
- Hose Fittings (1 inch, 1-1/4 inch, 1-1/2 inch)
- 2 inch PVC Adapter
- Sealing Rings / Gaskets
- Instruction Manual
Image 3.1: All included components of the Jebao STU-36 Clarifier.
4. Setup and Installation
Follow these steps for proper installation of your Jebao STU-36 Clarifier:
4.1 Placement
- The clarifier can be installed either vertically or horizontally. Choose a location that allows for easy access for maintenance.
- Position the unit and its transformer in a shaded area, away from direct sunlight, to prolong the lifespan of the components.
- Ensure the unit is placed in a stable position to prevent accidental movement or damage.
4.2 Water Connections
- Connect the clarifier to your pond or aquarium filtration system. The unit is designed to be installed in-line with your pump and filter.
- The clarifier includes fittings for 1 inch, 1-1/4 inch, and 1-1/2 inch hoses, as well as a 2 inch PVC adapter. Select the appropriate fittings for your plumbing.
- Ensure all connections are secure and watertight to prevent leaks.
4.3 Electrical Connection
- Once water connections are complete and verified, plug the transformer into a properly grounded GFCI-protected electrical outlet.
- Ensure the power cord is routed safely to avoid tripping hazards or damage.
Image 4.1: The Jebao STU-36 Clarifier unit with its external transformer.
5. Operating Instructions
The Jebao STU-36 Clarifier is designed for continuous operation during the active season of your pond or aquarium.
- For optimal water clarity, run the clarifier 24 hours a day from spring through fall.
- This unit is effective for ponds and aquariums up to 8,800 gallons, helping to eliminate green water and control algae growth.
- Monitor the water clarity. Significant improvement is typically observed within a few days to a week of continuous operation.
6. Maintenance
Regular maintenance ensures the longevity and effectiveness of your clarifier.
6.1 UV-C Lamp Replacement
- The 36-watt UV-C lamp has an approximate lifespan of 8,000 hours (about 11 months of continuous operation).
- For peak performance and consistent water clarity, it is recommended to replace the UV-C lamp every 6 to 12 months.
- To replace the lamp:
- Disconnect the clarifier from the power supply.
- Shut off water flow to the unit and drain any remaining water.
- Carefully open the clarifier housing according to the detailed instructions provided in the full manual (if applicable).
- Remove the old UV-C lamp and quartz sleeve.
- Clean the quartz sleeve thoroughly with a soft cloth and mild cleaner to remove any mineral deposits or algae. Rinse well.
- Insert the new UV-C lamp into the quartz sleeve, then reassemble the unit, ensuring all seals are properly seated.
- Restore water flow and check for leaks before reconnecting power.
6.2 Winterization (for outdoor ponds)
- In colder climates, remove the clarifier unit from the pond system before freezing temperatures occur.
- Drain all water from the unit and store it indoors in a dry, frost-free location.
- Avoid storing the unit in direct sunlight during the off-season.
7. Troubleshooting
If you encounter issues with your Jebao STU-36 Clarifier, consider the following common solutions:
- No Light from UV-C Lamp:
- Check if the unit is properly plugged into a working electrical outlet.
- Verify that the GFCI outlet has not tripped.
- The UV-C lamp may have reached the end of its lifespan and requires replacement.
- Inspect the transformer and wiring for any visible damage.
- Water Remains Green/Cloudy:
- Ensure the UV-C lamp is functioning (check through transparent inlets).
- The UV-C lamp may be old and losing effectiveness; consider replacing it.
- Check the water flow rate through the clarifier. Excessive flow may reduce contact time with UV-C light.
- Clean the quartz sleeve, as mineral deposits or algae buildup can block UV-C light.
- Verify that the clarifier is appropriately sized for your pond/aquarium volume (up to 8,800 gallons).
- Water Leaks:
- Inspect all hose and PVC connections for tightness.
- Check the sealing rings/gaskets within the unit for proper seating and damage. Replace if necessary.
8. Specifications
| Model | STU-36 |
| Power | 36-watt UV-C Lamp |
| Pond/Aquarium Capacity | Up to 8,800 gallons |
| UV-C Lamp Lifespan | Approximately 8,000 hours (recommended replacement every 6-12 months) |
| Power Cord Length | 22 feet |
| Hose Fittings Included | 1 inch, 1-1/4 inch, 1-1/2 inch |
| PVC Adapter Included | 2 inch |
| Approximate Unit Length | 21 inches |
| Item Weight | 8.85 pounds |
| Manufacturer | Jebao |
| EPA Establishment Number | 97745-CHN-1 |
9. Warranty Information
The Jebao STU-36 Clarifier comes with a 180-day warranty from the date of purchase. This warranty covers manufacturing defects but specifically excludes the UV-C light bulb, which is considered a consumable item.
Please retain your proof of purchase for warranty claims.
10. Customer Support
For further assistance, technical support, or inquiries regarding replacement parts, please contact Jebao customer service. Refer to the contact information provided on the product packaging or the official Jebao website.
