Dolphin debris falling out

dolphin

The Problem

When a Dolphin is lifted out and debris falls back into the pool, the robot has collected dirt but it is escaping through a torn filter, an unseated lid, or incorrect extraction technique. The debris was picked up — it is just not making it out of the pool with the robot.

Steps

1
At the end of the next cycle, grip the robot handle and lift it straight up — do not tilt until the robot body is completely clear of the water surface.
💡 The key moment is as the robot breaks the surface. Keep it horizontal until both the robot and cable connector are above the waterline.
2
Inspect the filter mesh under bright light. Hold it up and look for holes or tears — even small holes allow fine debris through.
3
Check the filter lid and latch. Confirm it closes firmly and does not rattle or flex when pressed.
4
If the filter is intact and the lid is secure, consider upgrading to a fine or ultra-fine mesh filter to capture smaller particles.
5
Inspect the rubber gasket or seal around the filter bay. If worn or compressed flat, debris can bypass the filter.

Possible Causes & Solutions

common

Robot tilted during extraction, spilling filter contents into the pool

Always lift the robot straight up and keep it horizontal until it is clear of the water surface. Tilting the robot during extraction allows filter contents to pour back through the inlet.

common

Filter mesh torn, allowing debris to escape back into the pool

A torn mesh holds large debris but allows fine particles and algae to flow back into the pool water as the robot operates. Inspect the filter mesh and replace if damaged.

occasional

Filter lid or latch not closed correctly

A filter bay that is not fully latched can open partially during the cycle, allowing debris to escape. Confirm the filter lid is fully closed and latched before each run.

occasional

Fine debris too small for the current filter mesh grade

Standard filter mesh captures larger debris but allows fine particles and algae to pass through. Upgrade to a fine or ultra-fine mesh filter for better fine-particle capture.

rare

Inlet gasket worn, creating a gap around the filter housing

A worn seal around the filter housing can allow water to bypass the filter, carrying debris back into the pool. Inspect the gasket for wear or damage.

When to Replace

Replace the filter mesh when torn or when fine debris consistently escapes despite correct extraction technique. Replace the filter bay seal when it is worn or no longer creates a watertight seal.

Where to Buy

Find compatible replacement parts from these retailers:

Check price for dolphin replacement parts on Amazon

Compatible Parts

Dolphin Fine Filter Basket

Upgrade from standard mesh to capture fine debris and algae. Confirm compatibility with your model.

Dolphin Ultra-Fine Filter Basket

Maximum fine-particle capture. Requires more frequent cleaning. Confirm compatibility.

Frequently Asked Questions

Why does my Dolphin leave a cloud of debris in the pool when lifted?

The most common cause is tilting the robot during extraction. The inlet faces downward and tilting opens a channel for filter contents to pour back out. Lift straight up and keep horizontal.

Can fine particles ever be captured completely?

Fine debris is difficult for any pool robot. An ultra-fine filter captures most particles, but very fine algae and silica may still pass through. Running the filter system after the robot cycle clears fine residual particles.

Should I empty the filter over the pool or away from it?

Always away from the pool. Rinse the filter with a garden hose or in a sink. Emptying the filter near the pool risks debris blowing or falling back in.