Introduction
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your NICREW Multi-Colored LED Aquarium Bubbling Stone Disk. Please read this manual thoroughly before use to ensure proper function and longevity of the product.

Image: The NICREW Multi-Colored LED Aquarium Bubbling Stone Disk, showcasing its round design with integrated LED lights and air stone. This device is designed to create a vibrant, bubbling effect in aquariums.
Package Contents
Verify that all components are present in the package:
- Round stone disk with built-in multi-color LED lights
- 3/16 inch air tube
- Power adapter
Note: An air pump is not included and is required for operation. It is recommended to use a 1.5W air pump and place it higher than the water level of the fish tank to prevent backflow.

Image: All components included in the package: the LED bubbling stone disk, a coiled air tube, and the power adapter. An air pump, which is necessary for the bubbling function, is not part of this package.
Setup Instructions
- Soak the Bubble Disk: Before initial use, soak the bubbling stone disk in water for at least 1 hour. This helps to ensure even bubble distribution.
- Connect Air Tube: Attach one end of the provided 3/16 inch air tube to the inlet nozzle on the bubbling stone disk. Connect the other end of the air tube to your air pump (not included).
- Position in Aquarium: Place the bubbling stone disk at the desired location on the bottom of your aquarium. The integrated suction cups can be used to secure it in place.
- Connect Power Adapter: Connect the power adapter to the LED bubbling stone disk. Ensure the connection is secure.
- Create Drip Loop: When connecting the power adapter to an electrical outlet, create a "drip loop" with the power cord. This prevents water from traveling along the cord and reaching the electrical outlet, ensuring safety.
- Plug In: Plug the power adapter into a suitable electrical outlet.

Image: A diagram illustrating the recommendation to soak the bubbling stone disk in water for one hour prior to use.

Image: A hand holding the NICREW LED Aquarium Bubbling Stone Disk, demonstrating its compact size and highlighting the connection point for the 3/16 inch air tube.

Image: A diagram illustrating the correct method of creating a drip loop with the power cord to prevent water from reaching the electrical outlet.
Operating Instructions
Once properly set up, the NICREW Multi-Colored LED Aquarium Bubbling Stone Disk operates automatically:
- LED Lights: The built-in LED lights will automatically cycle through multiple colors, creating a dynamic and visually appealing effect in your aquarium. This effect is most pronounced in a darkened room.
- Bubbling Function: When connected to an air pump, the disk will produce a continuous stream of fine bubbles. This promotes water circulation and aids in oxygenation within the aquarium.

Image: The NICREW LED Bubbling Stone Disk submerged in an aquarium, emitting a column of colorful bubbles. The integrated LEDs illuminate the bubbles as they rise, creating a vibrant display.
Maintenance
Regular maintenance ensures optimal performance and longevity of your bubbling stone disk:
- Cleaning the Stone Plate: Over time, algae or mineral buildup may reduce the airflow and bubbling efficiency. If this occurs, disconnect the device from power and remove it from the aquarium. Use a stiff brush to gently clean the surface of the stone plate.
- Air Tube Inspection: Periodically check the air tube for kinks, blockages, or damage. Replace if necessary to maintain consistent airflow.
- Power Cord Inspection: Regularly inspect the power cord and adapter for any signs of damage. Do not use if damaged.

Image: A diagram illustrating the process of cleaning the bubbling stone disk's surface with a brush to remove algae or other buildup.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No bubbles or weak bubbles |
|
|
| LED lights not illuminating |
|
|
| Unit floats or moves |
|
|
Specifications
| Feature | Detail |
|---|---|
| Model Number | PT0291 |
| Diameter | 2 inches (5.08 cm) |
| Product Dimensions (LxWxH) | 2.17 x 0.18 x 0.18 inches (5.51 x 0.46 x 0.46 cm) |
| Item Weight | 7.2 ounces (204 grams) |
| Light Source Type | LED |
| Color | Multicolor (Auto Color Changing) |
| Material | Stone (Base Material, Shade Material) |
| Power Source | Corded Electric |
| Air Tube Compatibility | 3/16 inch |
| Recommended Air Pump | 1.5W (not included) |
| Water Resistance Level | Waterproof (for the disk itself) |
Warranty and Support
NICREW is dedicated to providing quality products and customer satisfaction.
- Warranty: This product comes with a hassle-free 12-month warranty from the date of purchase.
- Customer Service: For any questions, concerns, or technical assistance, please contact NICREW customer service. We offer 24-hour friendly customer service.
- Contact Information: Please refer to the contact details provided on the product packaging or the official NICREW website for the most up-to-date support information.