Super Ultra-Fine Filter Kit S2
Part no. 9991496-ASSY · Filters
Fits 35 models: Quantum, Wave 90i, Explorer E30 and more
$73
Sold on Amazon
Help me choose
Our tested shortlist for inground, above-ground, cordless and small pools, with what each robot does and does not include.
Find my robotFree Shipping, 30-day trial and a low price guarantee on every robot. Talk to a Pool Pro
Free Shipping and a low price guarantee on every pump. Need help sizing a pump?
Hourly water readings and personalized guidance in the ICO app, with no subscription required. Ask a Pool Pro
UV systems are sized to your pump's flow rate. Talk to a Pool Pro before you order.
Can't find a part? We can usually source any pool or spa product.
Free tools for choosing and running pool equipment. See all tools or ask a Pool Pro.
Reviews are written by our in-house pool professionals from hands-on testing. How we test
$1,649
Regular price
Save
In stock
Why it stands outThe largest Dolphin filter ever. The XXL MaxBin™ takes it up a notch. The newer Gen-2 filter is over 225% larger than standard Dolphin filters. Combining the…
Sold out in our store. We link to Amazon so you can still buy it; as an Amazon Associate we earn from qualifying purchases.

Dolphin Quantum
The 2026 Dolphin Quantum sits at the top of the ProLine™ line-up — the intersection of power, features, and value. PowerJet 3D™ Mobility, an XXL MaxBin™ with NanoFilters™, SmartNav 2.0™, and smartphone control all come standard.
"For anyone hunting for the ultimate pool-cleaning machine, the Dolphin Quantum is the perfect intersection of power, convenience, and value."
Read the Dolphin Quantum Review →Six breakthroughs — from jet-drive mobility to next-gen filtration and navigation — that redefine what a robotic pool cleaner can do.
Vectored water-jet thrust gives the Quantum a range of motion no wheeled cleaner can match — climbing walls and holding the waterline.
The largest basket Dolphin has ever built — over 225% bigger — loaded with next-generation NanoFilters™.
SmartNav 2.0™ maps your pool in real time, covering every inch of floor, walls, and waterline without wasted passes.
Dual HyperBrushes™ scrub 2× faster to dislodge even stuck-on algae and biofilm before sweeping it into the MaxBin™.
High-traction continuous rubber tracks grip any surface — plaster, pebble, tile, fiberglass, or vinyl — without slipping.
A patented 360° cable swivel lets the cord rotate freely, so it never knots up — cycle after cycle.
The included NanoFilters™ snap into the basket in seconds and pull dirt, algae, and microscopic particles straight out of the water column — keeping contaminants from recirculating back into the water you swim in.
The result is crystal-clear, polished water that standard filters simply can't deliver.
Run the Quantum every day, every other day, or every third day — the built-in weekly timer handles the rest. Or take full control from anywhere with the myDolphin™ Plus app: start, stop, and schedule cleanings, switch modes, steer to a specific spot, and get smart alerts straight to your phone.
The Quantum's newly designed frame is sleek and low to the ground for minimal water resistance as it climbs slopes and walls. A convenient carry handle sits within easy reach, and a fast water-release system sheds excess weight — so it stays light and easy to lift, even after a full two hours in the pool.
Every detail of the Quantum was engineered to think for itself. An intelligent power supply coordinates the onboard sensors, schedules cleaning cycles, and quietly manages performance in the background — adapting to your pool and your routine, so the work is already done by the time you walk outside.
Best-in-Class Warranty
The Dolphin Quantum will forever change the way you view a clean pool. Rated one of the best Dolphin pool robots for 2026, the Quantum picks up where other robots fall short. Try it in your pool for 30 days, and if you're not 100% satisfied, just return it. Let the Quantum challenge everything you thought you knew about robotic pool cleaners.
| Pool Type | Inground |
|---|---|
| Maximum Pool Length | Up to 50 ft |
| Cleaning Coverage | Floor, Walls, Waterline |
| Included Filtration | XXL MaxBin Basket, NanoFilters |
| Power | Corded with Low-Voltage Power Supply |
| Cable Length | 60 ft with Anti-Tangle Swivel |
| Timer | Weekly Timer |
| Smartphone App | Yes |
| Remote Control | Included |
|---|---|
| Navigation | SmartNav 2.0 |
| Motors | Dual DC |
| Scrubbing Brushes | 2 |
| Weight | 35 lb |
| Warranty | 2-Year Manufacturer's Warranty |
| Brand | Dolphin |
| Model Number | QUANTUM16 |
Shoppers who compare the Dolphin Quantum most often end up with one of these two. Same kind of pool, similar budget, and here is exactly what changes.
| Specification |
Dolphin Quantum
This page
|
Clear SBest UltraFilter Robot
|
Clear UVBest for Algae
|
|---|---|---|---|
| Price | $1,649 | $1,749 | $1,999 |
| Pool Type | Inground | Inground | Inground |
| Maximum Pool Length | Up to 50 ft | Up to 50 ft | Up to 50 ft |
| Cleaning Coverage | Floor, Walls, Waterline | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Included Filtration | XXL MaxBin Basket, NanoFilters | UltraFilter | UltraFilter |
| Power | 60 ft cable with swivel | 59 ft cable with swivel | 59 ft cable with swivel |
| Timer and App | Weekly timer, App, Remote included | Weekly timer, App, Remote included | Weekly timer, App, Remote included |
| Weight | 35 lb | 27.6 lb | 27.6 lb |
| Warranty | 2 Years | 3 Years | 3 Years |
| Link | View Clear S | View Clear UV |
19 genuine Maytronics parts fit this robot, 9 of them sold on Amazon: filters, brushes, tracks, power supplies, cables, motor units, caddies and covers.
Part no. 9991496-ASSY · Filters
Fits 35 models: Quantum, Wave 90i, Explorer E30 and more
$73
Sold on Amazon
Part no. 9983122-R1 · Brushes
Fits 16 models: Quantum, Explorer E30, Explorer E50 and more
$23.37
Sold on Amazon
Part no. 99956035US-F1 · Power Supplies
Fits 16 models: Quantum, Cayman, Explorer E20 and more
$399.99
Out of stock online
Part no. 9983152-R2 · Tracks
Fits 40 models: Quantum, Cayman, Escape and more
$34.99
Out of stock online
Part no. 99958907-DIY · Cables
Fits 7 models: Quantum, Active 20, Premium 30 and more
$149.99
Sold on Amazon
Part no. 9995266-R1 · Motor Units
Fits 62 models: Premier, Quantum, Sigma and more
$12.74
Sold on Amazon
2-Year Manufacturer's Warranty from Maytronics. Every product carries the manufacturer's warranty shown on its page. Pool Express is an authorized dealer, so your warranty is valid.
Try it in your pool for 30 days. If it is not right for you, return it within 30 days of delivery for a full refund of the purchase price. You pay the return shipping. There is never a restocking fee. Full return policy
Free shipping on every order to the contiguous United States. Orders placed by 2:00 pm Central Time, Monday through Friday, ship the same business day. Orders placed later ship the next business day. Most orders arrive 1–3 business days after they ship. Allow up to 5 business days for rural addresses. Shipping details
| Specification |
Dolphin Quantum
This page
|
||
|---|---|---|---|
| Price | $1,649 | $1,999 | $2,399 |
| Pool Type | Inground | Inground | Inground |
| Maximum Pool Length | Up to 50 ft | Up to 50 ft | — |
| Cleaning Coverage Floor, walls, or up to the waterline | Floor, Walls, Waterline | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Included Filtration Fine filters catch algae-sized debris | XXL MaxBin Basket, NanoFilters | Standard Cartridge, NanoFilters, Oversized Leaf Bag, Multi-Media | Standard Cartridge, NanoFilters |
| Cable | 60 ft with Anti-Tangle Swivel | 60 ft with Anti-Tangle Swivel | 60 ft with Anti-Tangle Swivel |
| Timer | Weekly Timer | Weekly Timer | Weekly Timer |
| Smartphone App | Yes | No | Yes |
| Weight | 35 lb | 35 lb | 35 lb |
| Warranty | 2 Years | 3 Years | 3 Years |
| Link | View Dolphin Premier | View Dolphin Sigma |
Select up to 3 products
Reviews are written by Pool Express customers over several seasons; some may describe an earlier model year with different features.
4.4
| 5 star | 56% | |
|---|---|---|
| 4 star | 35% | |
| 3 star | 7% | |
| 2 star | 2% | |
| 1 star | 0% |
Going on 2 yrs and still performing well. replacement screens are expensive.
From the moment I unwrapped it I knew I’d love it. What impressed me the most was the filter baskets, with its removable sides. Compared to my old Dolphin, that used a bag, the I had to empty, wash and scrub, what a laborious pain it was. If I had to mention a deficiency, I’d list the fact that the clean cycle is too short, perhaps there’s a longer cycle, that I’m unaware of. I did experience a problem with the filter panels, that started disintegrating about a year after I got, When I contacted Maytronics, they offered to replace them as a one time courtesy Kudos to them!
We were able to let go of our pool guy because of purchasing this unit. It does an excellent job of getting the dirt out and the fact that it can even climb the walls is a neat feature! The only reason we gave it four stars is the cord should be on a swivel. The manufacturer explains that it doesn’t need a swivel because of the intelligence it has to “learn” your pool but the swivel should have been included. The cord is very long and it is a lot to ask of a machine to not get it tangled. The swivel would assist the unit plain and simple!
This is a really good pool cleaner but not perfect - may miss a spot or two at times especially in corners. It seems to spend too much time on the walls and the water jets tend to blow leaves out of the way at times versus sucking them up. Very easy to clean filters which hold a lot of leaves. Just hose off the basket - no need to remove the filter plates from the basket for cleaning. I spread the cord out along the length of the pool deck as directed (NOT on the water) and let the unit pull the cord into the water as needed. I throw the cleaner into the pool at the midpoint. Doing this, the cord NEVER gets tangled. I use the fine filter set and I purchased a rough filter basket insert from Sunplay ($40) that is made for the S300i cleaner and use both together to get two levels of filtering during cleaning (same as more expensive S300i). The inner basket captures the leaves and rough debris and the fine filters capture the fine debris. Nice addition. Overall, happy with the purchase.
Yes it can!
If your Dolphin powers on but does not move, try checking the tracks for any debris or obstructions. Also, check the drive motor and impeller for any damage or wear. If you are still having issues, contact Maytronics customer support for further assistance.
If your Dolphin's power supply is not turning on, check to make sure it is properly plugged in and that the outlet it is plugged into is working. If the power supply is still not turning on, contact Maytronics customer support for further assistance.
If your Dolphin is not cleaning the pool properly, try checking the filter bag for any debris or blockages. Also, check the brushes and tracks for any damage or wear. If you are still having issues, contact Maytronics customer support for further assistance.
For general Wifi connectivity guide, please refer to the Dolphin user manual or contact Maytronics customer support for further assistance.
The handles on your Dolphin are for lifting and carrying the unit, while the floats are designed to help your Dolphin navigate around the pool and maintain proper buoyancy.
You should download the MyDolphin™ Plus App for your Dolphin robotic pool cleaner.
Registering your Dolphin robotic pool cleaner allows you to receive important product updates and notifications, as well as access to exclusive content and promotions.
With free shipping, a 30-day trial, and low price guarantee, we're proud to be one of the largest online retailers of all the top pool brands.