The catch
Dolphin Nautilus CC
A 33-foot pool limit, and no waterline scrubbing.
Side by side
Dolphin Nautilus CC vs Polaris 9550 Sport Compared: Neither uses a phone, but Polaris adds waterline work and retrieval help
Quick verdict
Nautilus CC is the choice for a suitable above-ground pool or basic floor-and-wall cleaning in a pool up to 33 feet. Polaris 9550 Sport is the choice for an in-ground pool up to 60 feet, waterline cleaning and physical remote steering. The Polaris additionally comes with a transport caddy and Easy Lift assistance. Phone control is not offered by either.
Before you buy
Why, and what it costs you
With a small above-ground pool, the apparent upgrade turns around
Not every pool is documented as a fit for the larger Polaris. In a suitable 24-foot above-ground pool, the listed class and length match Nautilus CC, whereas the 9550 Sport specification is in-ground.
Where this comes from
Polaris lists In-Ground, while Maytronics explicitly lists In ground and Above Ground, and 24 ≤ 33. Class and length are both required, and surface and shape checks come after.
The catch
Polaris 9550 Sport
It is specified for in-ground pools alone.
Dolphin Nautilus CC
- Why pick it
- Go with a model that is explicitly listed for suitable above-ground pools
- Stay with plain floor-and-wall cleaning in a small pool, using a robot of 14.8 lb dry
- The catch
- A 33-foot pool limit, and no waterline scrubbing.
Polaris 9550 Sport
- Why pick it
- Get waterline cleaning, or handle an in-ground pool longer than 33 feet
- Work with a physical remote, assisted retrieval and the transport caddy that comes included
- The catch
- It is specified for in-ground pools alone.
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What this page compares
Nautilus CC and Polaris 9550 Sport are compared on above-ground or in-ground suitability, waterline coverage, physical steering and the included retrieval equipment.
Nautilus CC is the choice for a suitable above-ground pool or basic floor-and-wall cleaning in a pool up to 33 feet. Polaris 9550 Sport is the choice for an in-ground pool up to 60 feet, waterline cleaning and physical remote steering. The Polaris additionally comes with a transport caddy and Easy Lift assistance. Phone control is not offered by either.
Which one fits
Pick the situations that sound like you
A 24-foot above-ground pool, if suitable
Within 33 feet, Nautilus CC lists above-ground pools. The only application listed for Polaris 9550 Sport is in-ground.
- Dolphin Nautilus CC
- Good
- Polaris 9550 Sport
- Not suitable
A 45-foot pool, in-ground
Nautilus CC's 33-foot limit is exceeded by 45 feet, which falls within Polaris's 60-foot rating. Surface and shape still need checking.
- Dolphin Nautilus CC
- Not suitable
- Polaris 9550 Sport
- Good
A 30-foot in-ground pool where waterline cleaning is required
Polaris alone lists a waterline cleaning mode.
- Dolphin Nautilus CC
- Not suitable
- Polaris 9550 Sport
- Good
You have to have a physical steering remote
A motion-sensing remote is supplied with Polaris, and Nautilus CC explicitly has no remote control.
- Dolphin Nautilus CC
- Not suitable
- Polaris 9550 Sport
- Good
Control from a phone is essential
Each exact specification says no mobile app.
- Dolphin Nautilus CC
- Not suitable
- Polaris 9550 Sport
- Not suitable
Only floor and wall cleaning is needed in a 30-foot in-ground pool
Length and surfaces are covered by both as stated. Compare the equipment you need instead of naming a winner on cleaning performance.
- Dolphin Nautilus CC
- Good
- Polaris 9550 Sport
- Good
In practice
Differences you will notice
With a small above-ground pool, the apparent upgrade turns around
Not every pool is documented as a fit for the larger Polaris. In a suitable 24-foot above-ground pool, the listed class and length match Nautilus CC, whereas the 9550 Sport specification is in-ground.
How we worked this out
Polaris lists In-Ground, while Maytronics explicitly lists In ground and Above Ground, and 24 ≤ 33. Class and length are both required, and surface and shape checks come after.
Waterline cleaning is its own reason to buy
Both length ratings accommodate a 30-foot in-ground pool, but a need for waterline cleaning points to Polaris. That pool does not call for extra length capacity, yet the added surface mode still counts.
How we worked this out
Polaris explicitly offers a Waterline Only mode, while the Nautilus CC table says Waterline Scrubbing No. 30 ≤ 33 and 30 ≤ 60.
Different parts of the routine are handled by a remote and by a caddy
Polaris packages poolside steering, assisted surfacing and transport equipment together. That may reduce the need for separate accessories, but it does not establish a lighter robot or remove physical retrieval.
How we worked this out
Maytronics lists Remote Control No, while Polaris documents the motion-sensing remote, Easy Lift and an included caddy. The review included no comparable Polaris dry-weight measurement and no lifting-force test.
Option A
Dolphin, 99996113-USB
Nautilus CC
This compact corded Dolphin climbs walls and still stays light and uncomplicated.
- Best for
- Go with a model that is explicitly listed for suitable above-ground pools
Facts we checked
- Pool class and length: In-ground and above-ground, up to 33 ft
- Cleaning surfaces: Floor and walls, no waterline
- Physical steering: No remote control
- App control: No
Option B
Polaris, F9550
9550 Sport
Four-wheel drive, a five-liter canister, a waterline mode and a motion-sensing remote come together in this pool robot.
- Best for
- Get waterline cleaning, or handle an in-ground pool longer than 33 feet
Facts we checked
- Pool class and length: In-ground, up to 60 ft
- Cleaning surfaces: Floor, floor/wall or waterline-only modes
- Physical steering: Motion-sensing handheld remote
- App control: No
Spec by spec
Where they really differ
| Spec | Dolphin Nautilus CC | Polaris 9550 Sport | In practice |
|---|---|---|---|
| Pool class and length | In-ground and above-ground, up to 33 ft | In-ground, up to 60 ft | Pool class and surface compatibility still apply whatever the length rating says. |
| Cleaning surfaces | Floor and walls, no waterline | Floor, floor/wall or waterline-only modes | Climbing walls by itself does not show waterline cleaning. |
| Physical steering | No remote control | Motion-sensing handheld remote | Here you steer from the poolside. Phone steering is not available. |
| App control | No | No | If you need phone control, pick a different model. |
| Filter equipment | Top-access fine filter, no full-filter indicator | 5 L canister and dirty-canister indicator | A canister's volume does not rate how fine the filtration is. |
| Cable swivel | No | Tangle-reducing swivel | A swivel makes the cable easier to manage, but the cable still needs care. |
| Retrieval and transport | No equivalent assisted-retrieval feature established in reviewed specification | Easy Lift and included transport caddy | A caddy should not be assumed to save you from lifting or draining the robot. |
Trade-offs
What each pick costs you
With Dolphin Nautilus CC
- Without a physical remote or cable swivel.
With Polaris 9550 Sport
- A caddy takes up storage space, and assisted retrieval still means handling the robot.
Change of plan
When the answer changes
An above-ground pool no longer than 33 feet
Go with Dolphin Nautilus CC. In this pair, Nautilus CC alone lists that application. Surface and shape still need confirming.
You cannot do without waterline cleaning or physical remote steering
Go with Polaris 9550 Sport. Nautilus CC excludes those functions, while Polaris documents them.
Control must come from a phone
Neither model fits. No app works with either exact model.
Decision guide
How to decide
Nautilus CC fits a suitable above-ground pool or basic floor-and-wall cleaning in a pool up to 33 feet. Polaris 9550 Sport fits an in-ground pool up to 60 feet, waterline cleaning and physical remote steering. Polaris also adds a transport caddy and Easy Lift assistance, and neither provides phone control.
Fit the pool first, then pick features
Note your pool class, longest dimension, surface and shape. For a long in-ground pool, Polaris's 60-foot rating can justify the upgrade, but it does not make that cleaner a documented fit for an above-ground installation. With a short in-ground pool, you have room to choose based on coverage and handling.
Decide what surfaces need work
In its technical table, Nautilus CC cleans the floor and walls but leaves out waterline scrubbing. Polaris adds a waterline-only mode, which is a concrete difference even in a small pool. Neither specification proves that every step, shallow ledge or unusually shaped section gets completely cleaned.
Think through the trip from pool to storage
Easy Lift on the Polaris brings the robot to the side and helps evacuate water, and the caddy then helps with transport and storage. Nautilus CC publishes a 14.796 lb dry weight, but retained water and grip also affect the lift. Check access, safe handling and storage space, and do not assume a caddy makes either robot easy to move.
What this page can’t tell you
- No comparison of cleaning speed, pickup, navigation or lifting force was run.
- Polaris's 5 L canister capacity does not prove finer filtration than Dolphin's fine media. Nautilus caddy contents that are unconfirmed are not counted as missing.
By the numbers
What the data shows
What we found across the robot pool cleaners we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Dolphin Nautilus CC |
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| Polaris 9550 Sport |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Dolphin Nautilus CC
Go with a model that is explicitly listed for suitable above-ground pools
See price & reviews on AmazonPolaris 9550 Sport
Get waterline cleaning, or handle an in-ground pool longer than 33 feet
See price & reviews on AmazonEach link opens in a new tab.
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