Water-Change-Free Bio-Pool 40

This is a set including a 40-liter turtle tank and a 13-liter filtration tank.

A wooden frame has been added, and it's equipped with a solar-powered motor for maintenance-free operation. The solar motor runs energetically with a whirring sound on sunny days, a softer whining sound on cloudy days, and does not operate at night.

To address the difficulty of finding a place for the solar panel, a dedicated stand has also been created.

The submersible pump is designed for use with suction cups, but anticipating that suction cups can fail quickly, a submersible filter was created to also serve as a measure against clogging.
If you wish to enhance filtration capacity, I believe it would be most effective to bury the submersible filter with soil or similar material.

The wooden frame is made of solid domestic cedar wood with only the surface coated. Coating the back side would prevent the wood from breathing, eliminating its moisture-regulating function and making it prone to rot. As it is natural solid wood, cracks may occur due to aging, but it has been designed for continued use without issues.