1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Blue Wave Marbella 21-ft Round 52-inch Deep Hard Sided Steel Wall Above Ground Pool. Please read all instructions carefully before beginning assembly or use. Proper installation and maintenance are crucial for the longevity and safe enjoyment of your pool.

Image: The Blue Wave Marbella 21-ft Round Above Ground Pool, showcasing its design and size in a backyard setting.
2. Safety Information
Your safety is paramount. Failure to follow these safety guidelines can result in serious injury or death. Always supervise children and non-swimmers. Never dive into an above-ground pool. Ensure proper fencing and safety barriers are in place according to local regulations. Keep emergency equipment, such as a life ring or shepherd's hook, readily accessible. Do not use electrical appliances near the pool. Consult a qualified electrician for any electrical installations.
- Drowning Hazard: Children, especially those under five years, are at high risk of drowning. Keep children in sight and within arm's reach.
- No Diving: Shallow water. Diving or jumping can cause serious injury or death.
- Electrical Hazard: Keep all electrical cords, radios, and other electrical appliances away from the pool.
- Chemical Safety: Handle pool chemicals with care. Read and follow all manufacturer instructions.
- Adult Supervision: Never leave children unattended in or near the pool.
3. Package Contents
The Blue Wave Marbella pool package includes the following components:
- Marbella Steel Wall Pool Structure
- Standard-Gauge Blue Overlap Vinyl Liner
- Widemouth Leaf Skimmer
- Instruction Manual
Note: Additional accessories such as a pool pump, filter system, and ladder are sold separately and are required for full pool functionality.

Image: A visual guide detailing the components included in the Marbella pool kit (widemouth skimmer, overlap liner) and items typically sold separately (1.0 HP pump and sand filter, A-frame ladder).
4. Setup and Installation
Proper site preparation and assembly are critical for the stability and safety of your above-ground pool. Professional installation is recommended.
4.1 Site Preparation
- Level Ground: The pool must be installed on a perfectly level, properly prepared ground surface. Uneven ground can lead to structural failure and void the warranty.
- Clear Area: Choose a location free from overhead power lines, underground pipes, and sharp objects. Ensure adequate clearance around the pool for maintenance and safety.
- Drainage: Select a site with good drainage to prevent water accumulation around the pool base.
- Foundation: Prepare a solid, compacted base. This may involve removing sod, leveling the soil, and adding a layer of sand or crushed stone.

Image: A comparison showing a prepared, level sand base for the pool installation on the left, and the fully installed pool on the right, emphasizing the importance of proper site preparation.
4.2 Assembly
Assembly typically requires two to three helpers and can take one to two days. Refer to the detailed instruction manual included in your package for step-by-step assembly instructions for the steel wall, uprights, top seats, and liner installation.
- Unpack all components and verify against the parts list.
- Assemble the bottom track system on the prepared level ground.
- Install the steel wall into the bottom track, securing it as per instructions.
- Install the uprights and top seats, ensuring all connections are tight and secure.
- Carefully install the vinyl overlap liner, ensuring it is centered and free of wrinkles.
- Install the widemouth skimmer according to its specific instructions.
- Fill the pool slowly, smoothing out any remaining wrinkles in the liner as it fills.
5. Operating Your Pool
Once installed, your pool requires a pump and filter system (sold separately) to circulate and clean the water. Regular water testing and chemical balancing are essential for a safe and enjoyable swimming environment.
5.1 Water Chemistry
Maintain proper water chemistry by regularly testing and adjusting pH, alkalinity, and sanitizer levels. Consult a pool supply professional for recommended chemical levels and treatment procedures.
5.2 Filtration System
Operate your pump and filter system daily to ensure adequate water circulation and filtration. The duration of operation will depend on pool size, bather load, and environmental conditions.
6. Maintenance
Consistent maintenance will extend the life of your pool and ensure clean, safe water.
- Skimming: Regularly remove debris from the water surface using a skimmer net.
- Vacuuming: Vacuum the pool floor as needed to remove settled debris.
- Filter Cleaning: Backwash or clean your filter according to the manufacturer's instructions.
- Wall and Liner Inspection: Periodically inspect the pool wall and liner for any signs of damage, rust, or wear. Address minor issues promptly to prevent larger problems.
- Winterization: In cold climates, proper winterization is essential. Lower water levels, drain equipment, and use a winter cover to protect the pool structure and liner from freezing damage.
7. Troubleshooting
This section addresses common issues you might encounter with your above-ground pool.
| Problem | Possible Cause | Solution |
|---|---|---|
| Cloudy Water | Poor filtration, improper chemical balance, high bather load | Check filter, test and adjust chemicals, shock treat pool. |
| Algae Growth | Low sanitizer levels, poor circulation | Shock treat, brush pool walls, run filter longer, add algaecide. |
| Water Leak | Liner puncture, loose skimmer connection, faulty plumbing | Inspect liner for tears, tighten skimmer faceplate, check plumbing connections. |
| Pump Not Priming | Air leak, low water level, clogged skimmer basket | Check all connections for air leaks, ensure adequate water level, clean skimmer basket. |
For issues not covered here, consult a qualified pool technician or contact Blue Wave customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | NB7034 |
| Shape | Round |
| Diameter | 21-ft (252 inches) |
| Wall Depth | 52 inches |
| Capacity | 9,900 Gallons |
| Material | Galvanized Steel Wall, Vinyl Liner |
| Top Seats | 6-inch Hot-Dip Galvanized Steel |
| Verticals | 5-inch Steel |
| Color | Gray |
| Item Weight | 320 Pounds |
| Required Assembly | Yes |
| UPC | 672875004737 |

Image: An exploded view diagram showing the three layers of the pool wall: Hot-Dip Galvanized Steel Core, Zinc Aluminum Coating, and Protective Enamel Top Coat, designed for corrosion resistance.
9. Warranty and Support
Blue Wave provides a 15-year limited warranty on the pool structure. This warranty covers manufacturing defects and structural integrity under normal use and proper maintenance. Please retain your proof of purchase for warranty claims.
For warranty service, technical support, or replacement parts, please contact Blue Wave customer service. Refer to the contact information provided in your original packaging or visit the official Blue Wave website.

Image: A graphic highlighting the 15-year limited warranty on the pool structure, supported by over 33 years of industry experience and superior construction.