Pools are magnets for leaves, twigs, and a constant stream of unseen dirt. It’s not the large debris that’s the real problem, but the fine grit – the sand, silt, and microscopic particles – that cloud the water and dull its sparkle. A new generation of robotic pool cleaners aims to tackle this challenge, and the Maytronics Dolphin EON 120d is at the forefront of this innovation.
Unveiled recently, the EON 120d boasts a revolutionary filtration system designed to capture even the smallest particles, preventing them from recirculating and keeping your pool pristine. But does this ambitious design translate into real-world cleaning power? The answer, as with many innovations, is complex.
The heart of the EON 120d is its unique DebrisLock filter basket. Unlike traditional filters, this system utilizes a dense network of grilles, similar to those found in HEPA air filters, to effectively trap and contain debris. It’s a clever concept – a vault for filth, preventing anything from escaping back into the pool. However, this ingenious design comes with a significant drawback.
The EON 120d comes in two models: the 120d, reviewed here, and a more affordable EON 100 that surprisingly omits the DebrisLock technology. The 120d itself features a familiar robotic design, with asymmetric treads – wider at the front for traction, narrower at the back for maneuverability – and two spinning brushes to loosen dirt from surfaces. Its 24-pound weight and compact build make it reasonably easy to handle both in and out of the water.
Powered by a 9600 mAh battery, the robot offers up to four and a half hours of runtime. However, the standard cleaning cycle is only two hours, with a maximum extended cycle of three hours. A unique “UltraRun” mode allows for short, bi- or tri-daily cleaning sessions, enabling the robot to remain in the water for up to two and a half weeks without removal.
Operation is straightforward, with a single button controlling the core cleaning modes: floor only, waterline only, full coverage, and UltraRun. For more granular control, the Maytronics One app allows users to customize run times and other parameters. (Note: this is a separate app from Maytronics’ older MyDolphin Plus app.)
The DebrisLock filter basket truly stands apart. Debris enters the basket and is effectively sealed within, unable to escape. But this strength becomes a weakness when it’s time to empty it. Cleaning this filter is a frustrating experience.
Initial setup was unexpectedly challenging. Despite following instructions and configuring the app for a “Smart” mapping mode, the robot repeatedly failed to start on the first two attempts. A full power cycle finally resolved the issue, allowing the EON 120d to begin its cleaning journey. It was a rocky start.
Watching the robot in action proved surprisingly entertaining – and occasionally alarming. The EON 120d has a tendency to flip onto its back, whether descending from a ledge or attempting to climb a wall. Fortunately, it consistently rights itself, but the frequent tumbles are a curious quirk.
During testing, the robot achieved approximately 95% cleaning coverage, effectively removing both synthetic and organic debris. However, it consistently struggled with corners and steps, leaving a small amount of debris behind. While 95% is a respectable result, the recurring missed spots were noticeable.
Retrieving the robot is remarkably easy thanks to Maytronics’ innovative “clicker” tool. This device, included in the box, emits a signal that instructs the robot to end its cycle and climb to the waterline for convenient removal. Skeptical at first, I was pleasantly surprised by its effectiveness – a far simpler solution than using a traditional pole and hook.
Here’s where the frustration returns. While the DebrisLock filter excels at trapping debris, cleaning it is a laborious task. Leaves become stubbornly lodged within the intricate grille structure, resisting all attempts at removal with a garden hose. Painstakingly picking each leaf out by hand is the only effective method, and even then, the basket never feels truly clean. This arduous cleanup process is the EON 120d’s most significant flaw.
At $1,199, the EON 120d is priced competitively against other mid-range robotic pool cleaners. If budget is a primary concern, it’s worth considering. However, the sheer difficulty of cleaning the filter basket significantly diminishes the overall experience, making regular use feel like a chore. The innovative technology is impressive, but the practical realities of maintenance may give potential buyers pause.
