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Advance to a new pool cleaning experience with this top-of-the-line robot that brings, even more, ease and freedom to the advanced capabilities of Maytronics Dolphin S robots.
The Dolphin is not designed to be used with an extension cord or surge protector.
Dolphin pool cleaners purchased in the United States must be operated in North America in order to retain the warranty rights. Using any Dolphin pool cleaner outside of North America (that is purchased in the US) voids the warranty service agreement.
Yes, the Dolphin maneuvers around the pool by starting and stopping the impeller, allowing the cleaner to make precise turns, which simulates the ‘wheelie’ appearance.
Yes, the Dolphin cleaner has access to the MyDolphin Application. Please visit the App store via your Smart Phone and search keyword Maytronics. Download the App from the App store, launch the app and follow the prompts. Compatibility: Android version 4.3 or later; Apple iPhone 4S or higher/ starting at version 6.0 operating system. Requires connection with 3G/4G network with a minimum of 60% signal strength. Bluetooth feature must be enabled on the phone.
Please contact your original dealer of purchase for warranty service, if you dealer does not offer service please contact the Maytronics Corporate location via our toll free number at 888-365-7446 or simply us our ‘Contact Us’ page on our website.
The power supply is water resistant but not waterproof. Please cover the power supply if inclement weather approaches. Do not leave the power supply in standing water. Do not allow the power supply to be submerged in the pool.
5 out of 5 Demo model from Brown's pool Newnan, Ga
Rick Martin –
Previously owned a Hayward tigershark until it fell apart do to age. Obtained a s300i dolphin which operates way better than the tigershark. Very pleased with this model. Brown’s Pool pointed me in the right direction to try the dolphin and best decision I could make.
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2 out of 5 Review after 1 day - so please don't publish - hoping to resolve it
Patrick Kremer –
We just purchased S300i and had about 100 leaves at the bottom of our pool bz our Z5 Dolphin was finally worn down after 4 years of incredible service. The S300i seemed to have addressed our only two issues with the Z5 = lighter and easier to pull from the pull and a much larger basket. There were two major issues in the first 3 cleaning cycles =
1. the smaller intake bag would fill with leaves and no leaves would pass into the larger filter. So it didn’t matter if the filter were 10 times larger bz the intake bag became the pinch point.
2. the new machine moves so fast that it creates a current – when it is moving forward the current often lifts the leaves up above it and it is unable to catch them. And when it’s moving in reverse it has a jet that often blows the leaves out of its’ path.
I want to be very fair bz we’ve had the Dolphin Z5 for 4 years and it has been fantastic! I believe it is the workhorse of the residential line. 3 cycles of the Z5 would clean the leafiest of our pool days.
Two more things:
1. Somehow, on the 4th cycle – the S300i picked up everything! I would estimate it got 10 to 15 leaves per cycle on the first 3 and then 70 leaves on the 4th cycle. Pool was spotless. Not sure if it takes a couple of cycles for the intake bag to open up wider?
2. It scrubs the walls and floor way better than the Z5 tank.
I am hoping the first three cycles are not reflective of it going forward. The leaf build up only happens when we are out of town for a few weeks – or after many days of heavy rain when we don’t want to go in the rain and clean out the filters. That said, if it looks like the S300i is working – with it’s larger filter we will ensure we have it on automatic cycles when we are away and during our rainy season.
I’m writing bz I have had a great experience thus far with Maytronics and figured you would want this feedback on your product. Also – I would be grateful if you could let me know if you have encountered these issues with other customers? My wife wants us to return it and get another Z5 (believe the M500 is the updated Z5) and I want our S300i to work – so much easier to take out of the pool and would be great if we could take advantage of the larger filter.
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5 out of 5 Better than the Polaris 9550 Sport
Glenn English –
After numerous problems and expensive repairs on a Polaris 9550, including a failed cable replacement ($450 repair) and finally a failed controller unit (est. $700 repair), I gave up on the 9550, and after discussion with a few pool equipment experts, I bought a Dolphin S300i. Like the 9550, this unit is expensive, but that is about all they have in common. In addition to the expensive repairs, the 9550’s cable constantly tangled, the unit regularly stalled in a curve of my pool, the basket was thin and the fabric would split open if full. I purchased the S300i from All Seasons Pools & Spas in Roseville, CA. The store manager, Brandon, was extremely knowledgeable and helpful. He assembled the caddy for me and had it ready to go when I arrived at the store. Brandon even registered the S300i Unit for me with his store and with Maytronics. By buying at an authorized brick and mortal authorized dealer I got a full 3 year parts & labor warranty (1 year added to the standard 2 year warranty). After my issues with the 9550 this was huge. I ran the S300i to the test of cleaning my very dirty leaf filled pool and after 3 cycles my pool was super clean. This unit actually filters while it cleans so dirt is not just stirred up and spit back out. The cable has a tangle preventing adapter that works really well. The top loading basket and filter unit is easy to access and clean. It pick up big leaves and pretty much everything except for a few 12”+ long redwood twigs which I manually removed. If with proper care, the S300i last as long as the 7 to 10 years that I am hearing it should, I will be extremely happy, especially if most of those years are trouble free.
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5 out of 5 Our Dolphin S300i
Eric J. Roth –
I love this robot. We call ours Eva. I am most impressed with her wall climing ability and active brushing. After many, many hours of outstanding performance, it’s time to replace both white front wheel bushings but I’m not sure the part number. Could use some help with that. I highly recommend this unit as it is so well designed. Simply amazing.
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3 out of 5 Probably good for regular pools
Dan –
I bought the S300I thinking if anything could clean my pool while I did other chores this was it. Where I live broad leaves, pine needles, pollen, and dirt are a constant battle. The intake for leaves is kind of small for what I need, but it’s wide shape is better than circular ones for getting the pine needles. My pool is 10ft deep and about 40k gallons. It will move back and forth quickly without slowing down. While it does attack the leaves aggressively I wish they would make a beefier model for pools like mine. The app is less than useless can’t get it to work. Cleaning it out isn’t the easiest as leaves get caught in the vents and there’s no way to take them off to clean them out you have to wash them back and try to fish them out. So there is room for design improvement in my opinion. If any pool is a proving ground for robot cleaners mine is it. If you have mild leaves and dirt this will probably work great, but if you get a lot of leaves this will help but you will either have to help it or run it several cycles through out the day. If your thinking about buying this robot and aren’t surrounded by trees this will probably work great, but if I didn’t have all the trees I would have gone with a smaller one.
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5 out of 5 James is amazing
Olin –
I named mine James and without a doubt the best thing I bought this summer. He definitely has surpassed my wife and kids on my affections list and is about to pass our Golden Retriever. I spent a lot of time every summer vacuuming the bottom to mediocre results – not anymore. James has a relentless work ethic and he is doesn’t care if I lounge around and drink a beer. He picks up big leaves and the fine silt. Hit one button on the control panel and he is off. Easy to clean out in like a minute. Could not be happier. I don’t use the app much except to get it out of the water. The cart could hold it a little more securely when going over bumpy ground. Overall super happy and the cleanest my pool as ever been.
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4 out of 5 A Must Have!
Alton –
I knew when the wife wanted a pool, I would have to clean it. This thing is worth its weight in gold.
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4 out of 5 Pretty Good
Kyle –
This is my second Dolphin. The first was a Dolphin Diagnostic. (Original) At my old house we ran that for close to 8yr before it broke down. We moved the next season. Now at new house we installed a larger pool and first thing on the list was to buy a Dolphin Robot. I looked at many but the years I got from my first Dolphin I was set on Maytronics. We have had the S300i one season and it worked great. Then second season it started to fail. Would not startup. Took to dealer and they tested everything passed. Took home worked for 2 cycles then failed to start again. Even App would not connect. Lucky I purchased from an authorized dealer so I had 2yr warranty. I had to pay to send for repair and week later received it back they replaced Power Supply. I am getting ready to open pool this season and Hopefully it will work fine. I will update this review if I have problems.
Functionally the robot is great. It gets the sides and bottom of pool really well. And when I want to run it really quick before company comes over or if I see stuff settled on bottom I can us the app to schedule a quick bottom only cycle. A robot cleaner is a must for me and my pool care. As long as I have no more trouble with this model I would recommend it.
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4 out of 5 Awesome Pool Cleaner
Kelly L Shemeley –
This is my 1st automatic pool cleaner for my fiberglass pool. I’ve had my pool for 9 years and I waited this long as I heard that pool cleaners couldn’t get up my walls, steps and seats – this one came very highly recommended. I love the app and the only reason I gave 4 stars is that it does clean the steps very well, but it’s not great at getting in the seats, but overall I love this cleaner and it makes my life so much easier. Would definitely recommend purchasing this Dolphin!
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4 out of 5 Superb!!!
Chris Langford –
My first cleaner and I wanted to make sure I got one with longevity and one that works well. I’m very glad I made this purchase. This thing cleans the walls well, including the water line. It removes all in one cycle and the bag is super easy to remove and clean out. I love the app features that allow me to pin point where I need a quick clean, and bringing it to the surface for removal is a snap. My one complaint is the cord. It most definitely needs to be a swivel cord. This is the reason why only four stars. Other than that, I am super impressed with my S300i.
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4 out of 5 Dolphin
Diane Baer –
It does a good job but the cord tangles up constantly. It needs to be able to swivel like the Polaris does. Also, if I want to turn it on for an hour or whatever, it messes up the schedule I have set and I have to reprogram the schedule which is really a pain. I think there needs to be some improvements made on this product. I agree with someone else’s review–when you are trying to connect the IPhone app to the Dolphin it takes a while for it to connect. The circle just spins for a bit. A little annoying.
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4 out of 5 Almost Perfect.
Dennis M. –
Cleans well, I am happy I purchased the model with the filters. It picks up the finest of dust as well as small to medium leaves. The reasons for the mark down are design and app. The app locks up frequently so I have it scheduled to run each night and it does so with out issue. As far as design, the cord should swivel so it doesn’t tangle and there should be a pressure sensor to indicate the filters are dirty or clogged. Bottom line you will have a clean pool with this unit.
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5 out of 5 Glass family
Wayne Glass –
We really enjoy our dolphin and the ease of cleaning the basket. I have just one complaint and that is the blue cord that connects to the power pack. It is too stiff and gets twisted in the water. It needs to be more flexible. Overall, it cleans the pool great.
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4 out of 5 S300i review - Andriod app needs work
Glen A Davis –
I love the robot, but the app hangs at some point with every use. I have used 3 different Android devices. I can take close to a full minute “finding robots” before the bluetooth connection is made. 10% of the time it will just spin at that point, Once I get past that about 30% of the time it hangs “receiving info for robot” . To recover I have to shut down the app and restart it. When I do get to the point where it allows me to start cleaning and the robot takes off it is common for the app to lock up with I try to change the cleaning mode.
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5 out of 5 Little swimmer
Debra –
Best investment yet. Love the ease of cleaning and setting computer to my needs. Use it weekly or as needed. Set it up and watch it go – amazing!
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