Robotic vs suction pool cleaners: how to choose for your pool

A robotic pool cleaner suits owners who want walls and floor cleaned without adding pump hours or filter load, while a suction cleaner still makes sense for a simple pool with light debris and a pump already set up to drive it. This guide compares the two on pump time, filter load, leaf handling and everyday effort, so you can decide whether to stay with suction or switch.

Robotic or suction: the short answer

Neither type of pool cleaner is better for every pool; the right choice depends on your pump, your debris load and how much handling you are happy to do. A suction cleaner plugs into the skimmer and is driven by the filtration pump, so every hour it cleans is an hour your pump is running at a speed high enough to move it, and the debris it collects ends up in your skimmer basket. A robotic cleaner has its own motor, its own low-voltage power supply and its own filter, so it works independently of your pump and keeps the debris it collects out of your filter. Suction cleaners are still a fair choice: they are simple, they need no power supply of their own, and they can work well on a modest pool with light debris. If you are leaning towards a robot, the Dolphin robotic pool cleaners page covers model choice.

Robotic vs suction pool cleaners side by side (comparison table)

Robotic and suction pool cleaners differ most in where their power comes from and where the debris goes, as the table below sets out factor by factor. Neither column wins on every row; read it against your own pool.

How a suction cleaner works and what it asks of your pump and filter

A suction cleaner works by borrowing your pool pump’s suction: according to Zodiac Australia, you attach it to the skimmer box, the filtration pump powers it, and it cleans the floor in a random pattern while depositing debris into the skimmer basket. Zodiac’s troubleshooting guide also covers suction cleaners that are not climbing the walls well, so some models do clean walls. That makes the pump and filter part of the cleaner. Zodiac’s troubleshooting guide says the skimmer and pump baskets need to be clean to give enough suction flow for the cleaner to work, and that the filter should be backwashed or cleaned first. Zodiac also says to disconnect the cleaner before backwashing. Because debris from a suction cleaner goes through your skimmer and pump, it adds to what the filtration system handles, so filter type matters; the guide to sand vs cartridge vs glass media filters explains how each copes with a heavier debris load.

Where pressure cleaners fit

A pressure cleaner is a third type that sits between the two. Zodiac describes its Polaris 280 as powered by its own booster pump and collecting debris in its own filter bag, rather than sending it to the skimmer basket. So the main difference from a suction cleaner is where the debris goes and which pump drives it, though a pressure cleaner still needs its own booster pump.

How a robotic cleaner works and where it collects debris

A robotic cleaner works as a self-contained machine: it has drive motors, a pump of its own and an onboard filter basket, and it plugs into a power supply that sits beside the pool. The Maytronics manual for the Dolphin Basic 19 lists a switch-mode power supply with a low-voltage output under 30 volts DC, which feeds the robot through its blue cable. Maytronics Australia also sells cordless, battery-powered Dolphin robots. The debris the robot picks up goes into its own basket rather than your skimmer basket or main filter. The trade-off is that you empty and rinse the robot’s filter yourself. Maytronics recommends rinsing the filter before debris dries on it, cleaning the fine filter panels about once a month, and straightening the cable once a week to remove twists. Some Dolphin models also offer a weekly timer, a floor-only mode or a short cycle, set through an app.

Running costs and pump time: what actually drives the difference

A big driver of the running cost difference is how long, and how fast, the pool pump has to run. According to Energy Rating, a pool pump uses nearly 18 per cent of the electricity in the average Australian home with a pool, so pump hours matter. With a suction cleaner, the pump must run at cleaning speed for the whole cleaning period. With a robot, the pump only needs to run on its filtration schedule, and the robot runs from its own power supply for its cycle. AstralPool suggests a pump should be able to turn over all the pool water about once every 6 to 8 hours. The other cost drivers are the pump’s efficiency, the size of your pool, how often the cleaner needs to run and how long either cleaner lasts before parts such as hoses, brushes or a power supply need replacing. Energy Rating says that when comparing pumps of the same power, each extra star means around 20 per cent less energy use.

Suction cleaners and variable-speed pumps

A suction cleaner can work with a variable-speed pump, but only at a speed high enough to move it, which reduces the savings that slow running is meant to deliver. AstralPool explains that a variable speed pump can run slower when it is only filtering and speed up when needed, for example when a pool cleaner is running. Some pumps build this in: Zodiac’s FloPro E3 has an Eco mode for everyday filtration and a Clean mode for use with a pool cleaner, and its speed can be adjusted in 25 RPM steps. The practical result is a two-part schedule: a low speed for most of the day and a higher speed for the hours the suction cleaner works. A robot removes that second block, so the pump can stay on its low setting. Energy Rating also notes that a pump needs enough flow for the filter and any attachments, and suggests asking a professional what suits your system. The variable speed pool pump guide covers speed settings in more detail.

Leaves, storms and subtropical debris: which copes better on the Sunshine Coast

Heavy leaf drop is a weak point for suction cleaners. Zodiac itself says that in high-leaf areas, or where there is large debris such as gum nuts, a suction cleaner will have difficulty, and it points owners to its Polaris pressure cleaner, which collects debris in its own bag. Queensland’s Electrical Safety Office notes that storms, floods and cyclones are part of life in Queensland. Whatever a storm drops, a suction cleaner sends to the skimmer basket, and Zodiac says that basket and the pump basket must be clean for enough suction flow. A robot catches leaves in its own basket, but a full basket also stops it cleaning well, so after a big storm it may need emptying mid-cycle. Maytronics recommends storing the robot’s power supply somewhere dry in wet seasons because heavy rain can damage it. For floating leaves, Maytronics also sells a solar-powered surface skimmer that collects debris before it sinks. Owners in Noosa, Maroochydore and Caloundra can see local options through the location pages.

Downsides of robotic cleaners (and when suction is still the better fit)

The main downsides of a robotic pool cleaner are handling, upkeep and electrical care. A robot has to be lifted out to empty its filter and before anyone swims; Maytronics warns to take care to avoid back injury and to let the robot drain at the pool edge before carrying it. A corded robot’s power supply needs a properly located outlet, with no extension cord, and the manual says the power supply must be connected through an RCD (safety switch) rated no more than 30 mA. The robot should not run after liquid flocculants or clarifiers have been added, and should be removed when shock dosing, according to the Maytronics manual. Walls covered in algae can stop a robot climbing. Suction is still the better fit when the pool is small and simple, the debris is light, nobody can comfortably lift a wet robot, or there is no suitable outlet near the pool for a corded robot and you do not plan to have one installed.

Common problems with each type: owner checks vs when to call a technician

Most common faults with suction and robotic cleaners can be narrowed down with simple owner checks, but some point to the pump, pipework or electrics and need a technician. Unplug a robot’s power supply before inspecting it, as the Maytronics manual instructs.

Maytronics says a damaged robot cord must be replaced by a technician, not repaired by the owner. Queensland’s Electrical Safety Office says to always use a licensed electrician for electrical work, which includes installing a new power point or moving an existing one, so any new outlet near the pool is not a DIY job. For pump faults, see pool pump repairs.

Choosing your cleaner: a quick decision checklist

Choosing between a robotic and a suction cleaner comes down to a few questions about your pool and how you want to look after it. Work through them in order.

1. Check your pump. If it is a variable speed pump, a suction cleaner means running a higher cleaner speed for part of each day. A robot lets the pump stay on its filtration setting.
2. Look at your debris. Heavy leaf drop or gum nuts can be too much for a basic suction cleaner; Zodiac points high-leaf pools to a pressure cleaner that collects debris in its own bag.
3. Decide what needs cleaning. If clean walls matter to you, check whether the model climbs walls.
4. Consider lifting and handling. If no one can lift a wet robot out safely, a suction cleaner may suit better.
5. Check power near the pool. A corded robot needs an RCD-protected outlet and room for the power supply at least the distance your model’s manual gives from the pool edge. Queensland’s Electrical Safety Office says installing a new power point is a job for a licensed electrician.
6. Think about filter load. If your filter already needs frequent cleaning, a robot, which keeps the debris it collects in its own basket, can help.

If a robot fits, compare models on the Dolphin robotic pool cleaners page or read the overview of robotic pool cleaners on the Sunshine Coast. You can also talk it through with Billabong Pool Service at a local shop or through the contact page.