Introduction
This manual provides essential instructions for the setup, operation, and maintenance of your GloFish Crescent 5-Gallon Aquarium Kit. Designed for ease of use, this kit creates an optimal environment for GloFish fluorescent fish, enhancing their vibrant colors with integrated blue LED lighting and efficient filtration.
The GloFish Crescent Aquarium Kit includes a seamless, crescent-shaped acrylic tank, an energy-efficient blue LED lighting system, and a motor-driven Tetra Whisper MicroFilter. It is important to follow these instructions carefully to ensure the health and well-being of your aquatic pets.
Included Components
- Seamless, crescent-shaped 5-gallon acrylic aquarium
- Sleek black hood with integrated blue LED light stick
- Tetra Whisper MicroFilter (internal filtration system)
- One medium Tetra Whisper Bio-Bag Filter Cartridge

Image: GloFish Crescent 5-Gallon Aquarium Kit with its main components: the acrylic tank, internal filter, and LED light integrated into the hood.
Setup Instructions
- Unpack and Inspect: Carefully remove all components from the packaging. Inspect the aquarium and all parts for any damage. Do not use if any part is damaged.
- Rinse Components: Rinse the aquarium, gravel, and any decorations thoroughly with clean water. Do not use soap or detergents, as these can be harmful to fish.
- Aquarium Placement: Place the aquarium on a sturdy, level surface capable of supporting the weight of a full 5-gallon tank (approximately 50 lbs when filled). Ensure it is away from direct sunlight, heat sources, and drafts. The dimensions are approximately 16.5"L x 11.25"W x 16.5"H.
- Add Gravel: Place your rinsed aquarium gravel into the bottom of the tank. A depth of 1-2 inches is generally sufficient.
- Install Filter: Install the Tetra Whisper MicroFilter according to the instructions provided with the filter. Ensure the medium Tetra Whisper Bio-Bag Filter Cartridge is correctly inserted. The filter pulls water from the aquarium and pushes it through the cartridge, where debris and waste are collected.
- Fill Aquarium: Carefully fill the aquarium with dechlorinated water. Use a plate or plastic bag on top of the gravel to minimize disturbance while pouring. Leave about an inch of space from the top rim.
- Add Water Conditioner: Add an appropriate amount of water conditioner to remove chlorine and chloramines from the tap water, making it safe for fish. Follow the conditioner manufacturer's dosage instructions.
- Install LED Light: Place the sleek black hood onto the aquarium. The hidden blue LED light stick is integrated into the hood. Plug in the LED light.
- Aquarium Cycling: Before adding fish, it is crucial to cycle your aquarium. This process establishes beneficial bacteria that convert toxic fish waste into less harmful substances. This typically takes several weeks. Consult a reliable aquarium guide for detailed cycling instructions.
- Add Fish: Once the aquarium is properly cycled and water parameters are stable, you can gradually introduce GloFish fluorescent fish. Acclimate new fish slowly to the aquarium water temperature and chemistry.

Image: The crescent-shaped acrylic aquarium with a layer of black gravel, ready for water and decorations.

Image: Visual representation of the aquarium's dimensions, showing its length, width, and height.
Video: An honest review of the GloFish 5-gallon aquarium, demonstrating setup and features. This video provides a visual guide to setting up the tank and showcases its appearance with the blue LED lighting.
Operating Instructions
- LED Lighting: The blue LED light is designed to enhance the fluorescent colors of GloFish. It can be turned on or off via a switch, typically located on the power cord or the hood itself.
- Filtration System: The Tetra Whisper MicroFilter operates continuously to maintain water clarity and quality. Ensure it is always submerged and running when the aquarium is in use.
- Feeding: Feed your fish small amounts of high-quality fish food once or twice a day. Only feed what they can consume within 2-3 minutes to avoid overfeeding and water pollution.

Image: The GloFish aquarium illuminated by its blue LED light, highlighting the vibrant colors of the fish and decorations.
Maintenance
- Water Changes: Perform weekly partial water changes of 25% to remove nitrates and replenish essential minerals. Always use dechlorinated water that matches the aquarium's temperature.
- Filter Cartridge Replacement: Replace the medium Tetra Whisper Bio-Bag Filter Cartridge every 2-4 weeks, or as needed, to maintain optimal filtration. Do not replace all cartridges at once if you have multiple, as this can remove beneficial bacteria.
- Aquarium Cleaning: Regularly clean the interior and exterior surfaces of the acrylic tank with an aquarium-safe cleaner or a soft cloth to remove algae and water spots. Avoid abrasive materials that can scratch the acrylic.
- Water Testing: Periodically test your aquarium water for ammonia, nitrite, and nitrate levels to ensure a healthy environment for your fish.

Image: A detailed view of the aquarium's interior, showcasing the effect of the blue LED light on the fluorescent gravel and plants.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Cloudy Water | New tank syndrome (bacterial bloom), overfeeding, insufficient filtration, overstocking. | Perform partial water changes, reduce feeding, ensure filter is clean and running, avoid overstocking. Allow beneficial bacteria to establish. |
| Filter Not Working | Power outage, clogged impeller, motor failure. | Check power connection. Unplug and clean the impeller and motor housing. If still not working, the motor may need replacement. |
| Fish Illness/Stress | Poor water quality, improper temperature, incompatible tank mates, sudden changes in environment. | Test water parameters and correct any imbalances. Ensure stable water temperature. Research fish compatibility. Avoid sudden changes. |
| LED Light Not Illuminating | Power connection issue, faulty LED unit. | Check power plug and switch. If still not working, the LED unit may need to be replaced. |
Specifications
| Feature | Detail |
|---|---|
| Brand | GloFish |
| Model Number | 29045 |
| Tank Volume | 5 Gallons |
| Material | Acrylic |
| Shape | Semicircular (Crescent) |
| Product Dimensions (L x W x H) | 16.5" x 11.25" x 16.5" |
| Item Weight | 1 Pound (empty) |
| Included Components | Filtration, LED Lighting |
| Special Feature | Transparent |
| Target Species | Fish |
Warranty and Support
For warranty information, please refer to the label included with your product packaging. GloFish products are manufactured by GloFish. For additional support or inquiries, you may contact TetraCare at 1-800-423-6458 or visit their website for professional support resources.

Image: Information regarding GloFish and professional support, including the TetraCare contact number.
