Start with the pool, not the brochure
A robotic cleaner is one of those purchases that makes more sense when you begin with the backyard rather than the model names.
A compact plunge pool has different needs from a family pool used every day through summer. A pool under heavy tree cover has different cleaning demands again. The right fit usually comes down to a few practical details:
- pool length
- whether you want floor-only cleaning or walls and waterline as well
- the kind of debris that ends up in the water
- how often the cleaner is likely to run
- how much convenience matters to you when lifting, emptying and storing it
The smaller end of the range starts with models for pools up to 8 metres, while the larger end extends to 12 and 15 metres. The chart also separates floor-only cleaning from units that handle walls and waterline scrubbing.
A quick guide by pool type
| Pool situation | What usually matters most | Dolphin models worth a closer look |
|---|---|---|
| Small pool, plunge pool or above-ground pool | Light weight, easy handling, floor cleaning, compact size | S50, M3 |
| Typical family pool | Broader coverage, stronger filtration, easier routine cleaning | S200, M400 |
| Larger pool with more debris or higher expectations | Waterline cleaning, larger pool capability, extra convenience features | S300i, M500, M400 |
For a small pool, lighter and simpler can be the smart choice
The S50 stands out here because it as ideal for small, plunge and above-ground pools. It is ideal for pools up to 8 metres and for floor-only cleaning. It has a lightweight 6.3kg body and a top-access filter canister with fine filters.
The M3 also sits at the practical end of the range, being a robust entry-level model. For a homeowner with a modest pool and straightforward cleaning needs, that kind of placement matters. It suggests a cleaner chosen for steady use rather than for feature collecting.
That is often the calmer way to buy. A smaller pool does not always need the biggest machine in the brochure. It needs a cleaner that feels easy enough to use regularly.
For a family pool, coverage starts to matter more
This is where broader cleaning coverage becomes more important. The range moves beyond floor-only cleaning into wall and floor cleaning, with waterline scrubbing higher in the line-up. The S200 is a lightweight popular choice, while the M400 is a powerhouse popular choice.
The M400 suits pools up to 12 metres and includes floor, wall and waterline cleaning, a dual cartridge multi-layer filter for fine and rough debris, a swivel cable to help prevent tangles, and a caddy as standard.
For many households, that is the point where a robotic cleaner starts feeling less like pool equipment and more like a routine-saving appliance. It is there to reduce the little buildup that turns into a bigger clean-up later in the week.
For a leafy backyard, filtration and debris handling come to the front
In that setting, debris handling matters as much as raw movement. More sophisticated models include features such as multi-filtration, dual filter options, swivel cable protection and larger pool capability. The M400 product also offers a dual cartridge multi-layer filter for both fine and rough debris.
For a leafy backyard, that is often the dividing line between a cleaner that keeps up and one that needs too much help. The premium end of the range, including the M500 and the app-connected S300i, is more likely to appeal to owners who want stronger coverage and a bit more convenience built into the routine, while the M400 sits in a practical middle ground with clearly stated debris and coverage strengths on the site.
A few sensible questions before choosing
Before settling on a model, it helps to ask:
- How long is the pool?
- Is floor cleaning enough, or will wall and waterline cleaning make a visible difference?
- Do leaves and larger debris land in the pool often?
- Will a lighter cleaner get used more often in your household?
- Do convenience features such as app control, timers, a caddy or swivel cable matter to you?
These are ordinary questions, though they make the choice clearer very quickly. In most backyards, the best cleaner is the one that suits the work the pool creates.
Frequently Asked Questions
It can be, especially where the pool is small, simple to access and mainly needs floor cleaning. The S50 is for pools up to 8 metres. It is suitable for small, plunge and above-ground pools.
Often, yes. In pools that are used regularly, the visible mess is not always on the floor. Some models clean walls and waterline as well as the floor.
If your backyard is very leafy prioritise filtration, debris handling and coverage.
Not necessarily. For some households, a lighter cleaner gets used more often, which matters. The S50 weighs approximately 6.3kg, while the M400 weighs 11kg, and the right choice depends on the pool and the person using it.
The M400 is ideal for a pool size of up to 12 metres. There are other options available for pools sized between 12 and 15 metres.