Robotic pool cleaner comparison

Dolphin EON 120d vs Dolphin T3000

A side-by-side comparison of pool fit, cleaning coverage, filtration, controls and the better Pool Express option.

By Brian Williamson, Pool Express product specialist
Updated November 9, 2026

Better alternative

A stronger Pool Express option

Dolphin EON 120d and Dolphin T3000 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

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EON

Dolphin EON 120d

Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with minimal filter maintenance and a three-year warranty.

Listed price See product

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T-Line

Dolphin T3000

Inground and above-ground pools up to 50 ft with steps or a sun ledge that need full-coverage cleaning with scheduling and modes.

Listed price $1,449

View better alternatives

A better alternative

What we recommend instead

Pool Express pick

Dolphin Quantum

Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

$1,649

Buy Dolphin Quantum

Buying guidance

Dolphin EON 120d or Dolphin T3000: our take

Dolphin EON 120d and Dolphin T3000 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.

Pool fit and cleaning reach

Both robots are intended for inground and above-ground pools. Both are rated for pools up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin EON 120d lists SmartMap navigation. Dolphin T3000 lists 2 active brushes and CleverClean navigation.

Filtration and debris

Both models include Basket and UltraFilter. Both have documented fine-debris media, so basket capacity and ease of cleaning matter more than fine-particle capability.

Controls and day-to-day ownership

Both models provide a weekly timer and smartphone control. Dolphin EON 120d uses cordless battery power, while Dolphin T3000 uses continuous corded power. Dolphin EON 120d is listed at 24.3 lb versus 17.9 lb for Dolphin T3000; that 6.400000000000002 lb difference matters when lifting the robot from the pool.

Price, warranty and the decision

Each lists a 3-year manufacturer warranty. Dolphin EON 120d and Dolphin T3000 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

Feature check: what each robot actually has

A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.

Feature	Dolphin EON 120d	Dolphin T3000
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	Yes	Yes
Scrubs the waterline	Yes	Yes
Fine-debris filter included	Yes	Yes
Large-debris filter	Yes	Yes
Automatic scheduling	Yes	Yes
Smartphone app	Yes	Yes
Anti-tangle swivel	Not listed	Yes
3-year warranty	Yes	Yes
No recharging between cycles	No	YesEdge
Built-in UV-C water treatment	No	No

Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.

Where Dolphin EON 120d stands out

Dolphin EON 120d is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.

Cleans floor, walls, waterline, steps and 8 in ledges
DebrisLock self-backwashing filter

Where Dolphin T3000 stands out

Dolphin T3000 is the better fit for inground and above-ground pools up to 50 ft with steps or a sun ledge that need full-coverage cleaning with scheduling and modes.

Runs from continuous plug-in power without a recharge between cycles
Weighs 17.9 lb versus 24.3 lb