Fiberglass pools are known for their smooth, non-porous surface, making them easier to maintain than concrete or pebble finishes. But while algae and dirt don’t cling as aggressively, debris can still settle quickly—especially after storms or heavy pool use. A good robotic pool cleaner can keep your fiberglass pool sparkling without much effort on your part.
In this guide, we’ll explain why fiberglass pools require a slightly different approach to cleaning, what features matter most, and which robotic cleaners in 2025 are best suited to this pool type.
Why Fiberglass Pools Need the Right Cleaner
The smooth gelcoat surface of fiberglass pools allows robotic cleaners to glide easily, but it also means certain overly aggressive brushes can be unnecessary—or even cause premature wear. Instead, you’ll want a cleaner that’s efficient, gentle, and capable of covering walls, steps, and the waterline without excessive scrubbing force.
Challenges for robotic cleaners in fiberglass pools include:
- Slippery surfaces: Require strong suction or high-traction tracks to maintain grip.
- Gentle cleaning needs: Hard bristles are unnecessary—soft or PVC brushes work best.
- Waterline buildup: Sunscreen oils, pollen, and fine debris can collect at the waterline.
- Full coverage: The right navigation ensures no “missed spots” on slick walls.
Key Features to Look for in a Fiberglass Pool Cleaner
- Soft or PVC scrubbing brushes: Effective without damaging the gelcoat.
- Strong wall-climbing ability: To clean slick vertical surfaces and the waterline.
- High-traction tracks or wheels: Keep the cleaner stable on smooth walls.
- Efficient navigation: Covers the pool evenly without wasted passes.
- Large filter basket: Handles fine debris, leaves, and silt without frequent emptying.
Top Robotic Pool Cleaners for Fiberglass Pools in 2025
1. Dolphin Nautilus CC Plus – Best Overall
The Nautilus CC Plus is one of the most popular robotic cleaners for fiberglass pools. It has dual PVC brushes that scrub effectively without being too harsh, and its CleverClean navigation ensures complete floor and wall coverage. Suitable for pools up to 50 feet, it offers reliable cleaning cycles and a large top-load filter basket for easy maintenance.
2. Dolphin Premier – Best for Versatility
The Dolphin Premier’s interchangeable filter options make it ideal if your fiberglass pool sees different types of debris throughout the year. From large leaf bags to fine particle filters, you can customize it for your needs. The rubber tracks grip fiberglass surfaces well, and dual brushes give a thorough yet gentle clean.
3. Polaris 9450 Sport – Best Wall-Climbing Performance
Polaris models are known for their climbing ability, and the 9450 Sport excels at cleaning the slick walls of fiberglass pools. Its four-wheel drive system and wide suction intake handle both fine silt and larger debris with ease. It’s also lightweight enough to lift in and out of the pool without a struggle.
4. Dolphin Quantum – Best for Fine Debris
If your fiberglass pool is prone to fine dust, pollen, or sand, the Quantum’s oversized fine filter basket will impress you. Its PowerJet 3D Mobility system improves maneuverability on smooth surfaces, and the dual brushes help keep the waterline clean of sunscreen oils and grime.
5. Aiper Scuba S1 – Best Cordless Option
For those who want to avoid cords entirely, the Aiper Scuba S1 offers cordless operation and wall-climbing ability, even on slick fiberglass. It has multiple cleaning modes, decent suction, and a battery life long enough to clean an average pool in a single charge. Perfect if you value a tangle-free experience.
Tips for Maintaining a Fiberglass Pool with a Robotic Cleaner
- Choose a model with soft or PVC brushes to protect the gelcoat surface.
- Run the robot regularly—2–3 times a week during heavy use—to keep the surface spotless.
- Empty and rinse the filter basket after each use to maintain strong suction.
- Store the robot in the shade or indoors to prevent UV damage to plastic parts.
- Manually brush tight corners and steps occasionally, as most robots can’t reach every inch.
What to Expect
With the right robotic cleaner, your fiberglass pool will require far less manual brushing and vacuuming. While no model cleans every single inch of steps or benches, the best options will keep the floor, walls, and waterline consistently clear, reducing the need for deep cleanings.
Quick Comparison
- Dolphin Nautilus CC Plus: Reliable, gentle, and effective for most fiberglass pools.
- Dolphin Premier: Versatile filters and strong traction for varied debris.
- Polaris 9450 Sport: Excellent climbing and debris pickup.
- Dolphin Quantum: Best for fine debris and waterline cleaning.
- Aiper Scuba S1: Cordless convenience with wall-cleaning capability.
Final Thoughts
Fiberglass pools are easier to maintain than many other types, but the right robotic cleaner can make them virtually effortless to keep clean. In 2025, models like the Dolphin Nautilus CC Plus and Dolphin Premier offer the best all-around performance, while the Polaris 9450 Sport excels at wall climbing, the Dolphin Quantum shines with fine debris, and the Aiper Scuba S1 provides cord-free convenience.
By choosing a cleaner designed for smooth surfaces with gentle yet effective scrubbing, you’ll keep your fiberglass pool looking flawless all season long—without hours of manual cleaning.