During the reflection, students wrote many interesting questions and ideas, which were summarized 350 in Table . Group A received a different type of fish scales, sourced from South Asian Carp waste, specifically Catla catla. Although these scales were not used in the experiment, the students expressed curiosity about trying them in another laboratory session. Unbeknownst to them, Catla catla scales have been widely utilized in the biosorption process of various pollutants. Group B proposed a different method for image acquisition. In fact, there have been various colorimetric-based analysis variations studied, including using plastic containers with a white background, utilizing a computer screen as the background, positioning the light source behind the samples, and employing cuvettes with a specific light source that emits a specific wavelength. Groups C through J showed great interest in optimizing the adsorption process, from pretreatment of the fish scales to kinetics studies of heavy metal removal, for further exploration. Most of the students expressed a desire to continue this experiment in 360 the future.