Meet Caden Pohlkamp, 7th grader who built an underwater robot to test ponds

Caden Terence Pohlkamp, a 7th grader at Trinity Valley School in Fort Worth, Texas, has made headlines for building an underwater robot to assess water quality in 12 suburban neighborhood ponds. His innovative project revealed how artificial fountains can enhance aquatic ecosystems by improving oxygen levels and preventing harmful algae blooms. Pohlkamp’s work earned him recognition as a national finalist in the Thermo Fisher Scientific Junior Innovators Challenge, highlighting the potential of young inventors to address environmental challenges. Pohlkamp developed a remote-controlled underwater robot equipped with a waterproof body, motorized thrusters, live video transmission, and multiple digital sensors. These sensors measured key water parameters such as dissolved oxygen, pH, temperature, turbidity, and total dissolved solids. By designing the device himself, Pohlkamp avoided the need for costly commercial equipment. His creation enabled him to gather data from both surface waters and deeper zones of the ponds, providing insights into variations in water quality across different depths. His interest in the project stemmed from observations of varying water clarity and algae growth in nearby retention ponds. Pohlkamp noticed that some ponds, particularly those with functioning decorative fountains or underwater aerators, maintained better water quality than others. Through his experiments, he found that these artificial circulations helped maintain consistent oxygen levels throughout the water column. This movement prevented thermal stratification, a condition where warmer, less oxygenated water sits above cooler, denser water, limiting the availability of oxygen for aquatic life. The results of his research indicated that ponds with active fountains had significantly higher dissolved oxygen levels compared to those without. This increase in oxygen improved overall water health by reducing the likelihood of harmful algal blooms and unpleasant odors. In contrast, stagnant ponds exhibited lower oxygen levels near the bottom, leading to hypoxic conditions that can stress or kill fish and accelerate the decay of organic materials. Pohlkamp noted that the continuous flow created by fountains helps distribute oxygen more evenly, supporting a balanced ecosystem. Pohlkamp’s project gained attention after winning top honors at the Fort Worth Regional Science and Engineering Fair. His work caught the eye of the Society for Science, which listed him among the 30 national finalists in the 2025 Thermo Fisher Scientific Junior Innovators Challenge. According to official records, his design offers a cost-effective solution for monitoring urban stormwater systems and retention ponds. Homeowners' associations, local water management groups, and civil engineers could potentially use similar devices to track water quality without relying on expensive laboratory tools. In addition to his scientific pursuits, Pohlkamp participates in math competitions, plays in the school band, and engages in youth sports. Looking ahead, he plans to upgrade his underwater robot by incorporating features such as automatic navigation, additional chemical sensors, and mechanical arms capable of collecting sediment samples from pond bottoms. These enhancements aim to make the device even more versatile for environmental studies and community-based water monitoring efforts. Pohlkamp’s achievement underscores the growing role of young innovators in tackling complex environmental issues. His work demonstrates how accessible technology and creative problem-solving can lead to meaningful contributions in science and engineering. As he continues refining his designs, his project serves as a promising example of how curiosity and determination can drive impactful change.