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Great question — and after conferring with our internal SMEs, you’re spot on about the HOCl levels. You’re right that with high CYA, the actual active chlorine (HOCl) is much lower than in the 1–4 ppm FC range that Maytronics recommends with no CYA. So why do higher FC levels (even with CYA)...

Hey there—welcome to the world of pool robots! Extension cords: Yeah, the manual is serious about not using them, and it’s not just legalese. Extension cords can cause voltage drops or even overheating, which messes with the power supply and could damage the unit. That said, most people don’t...

It might be time to replace your ultra-fine filters—even if they look clean, they can get clogged over time with microscopic debris that reduces performance. Also, if your robot’s on its 4th season, the brushes could be worn down even if they seem okay visually. Both can affect how well the...

It sounds like you’re dealing with a communication issue between the robot and the control box—which usually means there’s a problem with the data connection, especially if you’re using a Wi-Fi–enabled (IoT) model like the Nautilus CC Supreme. All app-compatible Dolphin models use a three-wire...

Sorry you’ve had such a rough run with your units. The issue where the robot starts then stops after ~10 seconds is often related to a sensor or blockage. Before requesting service, try these steps: Don’t use an extension cord. Unplug everything and inspect the blue cable and prongs. Clean...

We recommend that you remove the cleaner out of the pool daily. Leaving the cleaner in an unbalanced pool will cause premature wear to the cleaner (like the gummy consistency of your blue cable). Please use the following link to our FAQs for information of the proper pool chemistry and...

Once you receive the new power supply unit, please follow the steps below to ensure it is configured with your robot to avoid issues connecting to the app - there is no need to delete the app before performing the steps: Connect the new power supply unit to the robot and do not connect to the...

Hello, Thank you for contacting us, we understand that you are having some issues with your Dolphin robot. According to the Dolphin behavior you describe, it seems that the Dolphin is using its Protection mechanism to shut down. Please try the following troubleshooting steps, it will only take...

The E20 is recommended for an 16x32 in-ground freeform pool; the warranty is processed by Maytronics. The owner is required to ship the robot to the service center for repairs.

The power supply for the Dolphin Active 20 cleaner should have <30 VDC output Input of 100-125 AC volts / 200-230 Volts 50-60 Hertz. The blue cable and power supply should be checked to ensure both are functioning correctly. I hope that helps!