Jecod GMP80 Support

Jebao / Jecod GMP & DMP Dry-Side Support and Catch Cradle

A free, printable support for the external motor of Jebao/Jecod GMP and DMP wavemakers. It supports the motor during normal operation and provides a built-in cradle to catch it if it pulls away from the aquarium.

I designed this after my own GMP-80 repeatedly lost its grip and fell several feet onto the hardwood floor. Cleaning the aquarium surface helped the suction cups hold, but I wanted something underneath the motor for the next time it came loose.

How It Works

The holder attaches to the outside of your glass or acrylic aquarium using double-sided mounting tape.

The front section supports the motor close to the aquarium wall, helping it sit straight and level while the pump’s original mounting system keeps it in position.

Toward the rear, the holder opens into an intentionally oversized catch cradle. If the suction cups release and the dry-side motor tips backward, that extra space allows it to settle into the cradle instead of falling to the floor.

The clearance around the rear is intentional. It is part of the catch mechanism. This is not meant to be a tight-fitting sleeve around the entire motor.

If the motor comes loose and settles into the cradle, turn the pump off, inspect the mounting surfaces, and reposition the motor before restarting it.

Model Compatibility

The original model was designed and physically tested with my Jebao/Jecod GMP-80.

The design is intended to be adaptable to other sizes in the Jebao/Jecod GMP and DMP series, including smaller models such as the DMP-40, by changing the print scale.

However, this is not a verified fit chart for every model. Motor dimensions and proportions may differ between sizes and series.

I do not have scale percentages for all the different pumps. You will need to measure your own motor and determine the appropriate scale.

When adjusting the model:

• Size the front support so the motor rests in its normal operating position.

• Preserve enough clearance behind it for the motor to tip backward into the cradle.

• Check that the motor remains captured when resting in the cradle.

• Remember that scaling the whole model also changes wall thickness.

• If your motor has different proportions, you may need to adjust individual dimensions rather than scale everything equally.

A small test print of the front support section can help check the fit before printing the entire holder.

Installation

1. Check the printed holder against your motor before attaching it to the aquarium.

2. Clean and dry the outside mounting area. Use a cleaning method appropriate for your aquarium material, particularly with acrylic.

3. Apply double-sided mounting tape suitable for the aquarium surface, the printed material, and the load it needs to support.

4. Position the holder underneath the correctly aligned dry-side motor. The front should support it without pushing it out of alignment.

5. Follow the tape manufacturer’s application and bonding-time instructions before loading the holder.

6. With the pump unplugged and the motor supported by hand, gently check that it can settle backward into the cradle without escaping.

The holder’s attachment needs to support the motor if the original mounting releases, so choose and apply the tape accordingly.

Printing Notes

Print settings will depend on your printer, material, and chosen scale. Use an orientation and wall thickness appropriate for a load-bearing bracket.

Check the finished print for weak layers, cracks, or excessive flex before installation. Keep the motor’s ventilation openings clear and leave access to its cable.

Why It’s Free

I made this to solve a problem with my own equipment and wanted to share it with other reef keepers. If you have a 3D printer, you can make your own.

If you successfully adapt it to another GMP or DMP model, please post a Make with the exact pump model, scale percentage, material, and any changes you made. That will help the next person get theirs fitted.