Based on @GLB_heie's 20-liter rear-filter aquarium, this design incorporates removable dividers, an aquarium cover, and a modified base.

Essential components, as per @GLB_heie's specifications:

1. One 20-liter aquarium.

Specific dimensions: 20cm*20cm*20cm, with 5mm thick glass.

2. One USB water pump.

Side filter type, less than 3cm in height, less than 4.2cm in length, and 3cm or less in width. The pump demonstrated in the video measures 4.1cm*3cm*2.9cm.

3. One aquarium light.

Select a suitable light for a 20cm aquarium.

Detailed specifications can be found here →DIY Desktop Nano Aquarium—Freshwater and Saltwater Compatible, 3D-Printed 20-Liter Rear-Filter Aquarium, Modular Design by HEIECN - MakerWorld