Maytronics Dolphin M400

We had actually ordered a different robot pool cleaner when we built our pool until my friends told us about the Dolphin. They had done a lot of research, so we decided to change to the Dolphin Supreme M4 and I'm so glad we did!!! It climbs the walls and spends a couple of hours vacuuming the pool, we usually chuck it in the water at night after we've finished swimming and it goes about it's job cleaning the pool so we get up in the morning and it's sparkling clean, ready for us to swim!
It's a fantastic product that cuts out soooo much of the work of owning a pool. I now recommend the dolphin to everyone I know who owns a pool!!!

Have only had my dolphin m400 for 1 year. This year our pool was losing water, pool leak specialist found 2 holes where wall and pool floor meet both same size. He asked me what I use to vacuum, I showed him my dolphin and he informed me that I was the 3rd person that used the dolphin that had holes. I have vinyl liner , and I’m not sure why this would be happening.
Have tried contacting Maytronics and have not heard back. Not happy having an expensive vacuum I am affaird to use for fear of more holes in liner.

The dolphin M400 has cleaned the floor of our pool amazingly. The pool now looks 100 percent. One of the downfalls is it will rarely climb walls or the beach we have at the entrance of the pool. Not sure if there is something wrong with it but i thought for 2100 bucks it would do this easily.

The M400 is easy to use, the filters are easy to clean, it’s runs for 2 hours straight, it climbs the walls of the pool to the top lip, it even cleans our spa including the straight edge seats! It’s perfect for people who don’t have hours to waste on cleaning, worth every cent!

Great pool cleaner it does what it suppose too and leaves my pool nice and clean when finished ( glass pebble)
I usually leave the fine debry basket in as my pool gets alot of dust & settles to the bottom, this Dolphin cleans it right up no worries!
What would of been nice on this model is an app to control manual navigation/ cycle time/ and clean modes, should be a standard thing on this model range.
Happy with my Dolphin M400.

After dealing with pool cleaners and the like which was a rip off and stressful, I finally bought a Dolphin. It is a revolution in pool maintenance ... just magic and has made owning a pool a pleasure.

My Dolphin M400 has been life changing - no more untangling the old robot driven by the booster pump and no more manual vacuuming! Easy to use, covers every part of the pool floor and picks up everything the gum and jacaranda trees can throw at it.
I leave the super-fine filters on there all the time and they’re great for collecting everything from big bits down to the fine sediments that get blown into the pool. The pool is kept nice and clean by running the Dolphin once a week and it’s east to flush out afterwards - the filters pop out and can be hosed down. Note it is a heavy unit though, especially when you first lift it out and it’s full of water.
Overall I’d highly recommend if you’re in the market for a new robot!

We bought an M400 after getting a demo by our local pool shop. Right from the start our unit had trouble as it would get caught on the lowest step in our pool. After some back and forth between ourselves, the pool shop and Maytronics, Maytronics provided a set of different side covers and the cleaner has been performing perfectly since. It now does a great job of picking up dirt and debris from the pool. Recommended.

This cleans all size materials and even dust from the water!
This machine has been working great I have had it now 6 I have a large 90k sqm fibreglass pool!!
I would happily go recommend this product to anyone wanting to update cleaners.

We purchased a home with a pool of around 50,000L and no pool cleaner. Not knowing much about how pools operated, we engaged the local pool shop who were supportive and sold us a machine that looked like a stingray and didn't really work leaving soot on the floor and other debris. I spoke with friends in Qld who have the M400 and swore by it, so I contacted Maytronics, had a demo of the M400. Unbelievable machine, simple to use, easy to clean and does what you expect. Our pool floor has never looked better. A free demo, cost nothing, give it a try.

contacted Maytronics for a demo of the m400 and i was contacted almost immediately by a local dealer who arranged to come around with the unit and give it a run in my pool. The agent from the pool shop was able to answer all my questions which ultimately lead to me purchasing the M400.

The M400 does an excellent job of cleaning fine debris from my pool, i don't really have a problem with leaves. Seeing as i've got a cartridge pool, having the M400 frees up my skimmer box to just filter the top of the water. I'm also able to save power by running my pool pump on the eco setting.

All in all, great purchase, should have picked one up ages ago.

Was a gift, cleans ok, spends too much time up walls, has now punctured liner. Power supply failed, and had to be replaced. Does not like curved surfaces, stairs, etc. The edges (front and rear) are too sharp for tight spaces.

Had an old Polaris pressure cleaner which gave up the ghost just before Christmas and decided to replace it with a robotic cleaner. We have a rectangular pebblecrete pool and after the recent storms in Sydney I put this cleaner in the pool for 4 days in a row. The amount of fine dust this has managed to remove from the pool is incredible. Very happy with the performance. The only downside I can find is the weight of the cleaner when you remove it from the water. I guess that's a small price to pay for its ability to scrub surfaces as well as vacuum debris.

we have just been told that it will cost more than a new one to repair . it run out of warranty 2 months ago . i expect that its life would be longer than that . out last one lasted 12 years with annual services different brand . It has been a good cleaner . but dies just after warranty grrr .NOW WHAT TO REPLACE IT WITH

I replaced a Dolphin M4 which I had for 5 years, with a newer M400. I am using it for the first time today. I can see a big improvement already. I am so happy about the change and would recommend this model. It's so easy to use. Easy to maintain and clean.

Got this robot cleaner for cleaning the rectangle shape fibre glass pool for dirt and leaves plus brush the surface of the pool. It get stuck at the corner of the steps very easily which I have to constantly check on it to make sure it is doing its job. I wish I can just switch it on and leave it. Not sure if it is because it is with form rollers in stead of the silicone flips rollers.