CUBE ChatShaala — Discussion Summary
Date: 29 May 2026
Today’s CUBE ChatShaala opened with a recap of yesterday’s session before moving into what became the central thread of the day, the Moina story unfolding across two institutions: CHM College, Ulhasnagar, Mumbai, and HBCSE CUBE Lab, Mumbai.
The session began by revisiting a key development from the previous day: Moina (specifically identified as Moina macrocopa JSK 1, the TCDS The Chosen Daphnia Species) had been collected by students from CHM College and brought to the CUBE Lab at HBCSE, Mumbai. This transfer formed the backbone of today’s discussion.
A significant portion of the early session was spent examining the water source question. Two types of water were placed under scrutiny: borewell water and chlorinated water supplied by the Kerala Water Authority. A diagram on the whiteboard illustrated the structural difference between a regular open well and a borewell, showing the soil surface, the pipe extending downward, the water level, and the submersible pump at the bottom. This comparison was not merely technical; it was biologically relevant. The question driving the discussion was whether the source and quality of water used to culture Moina would affect its survival and reproduction.
The Moina Story slide traced the journey of the organism. CHM College has a water tank located in the botanical garden in front of the main building. A water sample was collected from this tank and transported to the HBCSE CUBE Lab. This sample served as the source for establishing the Moina culture. The organism in question, Moina macrocopa JSK 1, was formally identified as the chosen Daphnia species (TCDS) for CUBE’s ongoing research.
The third slide mapped the social and collaborative network behind this work. Kajal Kumari was identified as the person who brought the Moina culture to CUBE, CHM College, and HBCSE. Samiksha, also associated with CHM College, Ulhasnagar, was mentioned as a participant. Seethalakshmi (from Thrissur) and Rechel (from Ranchi) were also present in the session, indicating the geographically distributed nature of this collaborative research community. The arrows on the whiteboard clearly showed the flow: Kajal Kumari → Moina → HBCSE, Mumbai → CHM College, representing the physical transfer of biological material between sites.
Participants also reflected on what it means to successfully culture Moina, not just collecting the organism from the wild, but maintaining it under controlled lab conditions, understanding the role of water quality, light, food (algae or yeast), and temperature in sustaining a healthy population.
Provocative Questions
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If borewell water and Kerala Water Authority chlorinated water both support Moina cultures, does that mean Moina is tolerant of chlorine, or does it simply degrade quickly in the container before the organism is affected? How would we test this?
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Moina macrocopa JSK 1 was collected from a water tank in a botanical garden. What does that tell us about the ecological niche Moina prefers? Is the presence of algae and organic matter in the tank the key factor, or does proximity to soil and plant roots play a role?
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The organism was transported from CHM College to HBCSE in a water bottle. What were the risks during transport: oxygen depletion, temperature change, mechanical stress? Did anyone monitor the population count before and after transit to assess survivorship?
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The CUBE network spans Mumbai, Kerala, Ranchi, and beyond. How does knowledge travel through this network? Is the experience of culturing Moina the same across different water sources and climates, or are there location-specific variations that participants are discovering?
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Why is Moina macrocopa JSK 1 designated as TCDS, The Chosen Daphnia Species? What makes it preferable over other Moina or Daphnia species for CUBE’s research purposes? Is the choice about ease of culture, size, reproduction rate, or something else entirely?
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A borewell draws water from deep underground aquifers, while a regular well draws from surface-adjacent water tables. How might the microbial composition and mineral content differ between these two sources, and how would those differences affect a Moina culture over time?
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If we accept that the botanical garden water tank is an active micro-ecosystem, what other organisms might have been co-collected along with Moina? How do we ensure the culture is pure, or do we even want it to be?
What I Have Learned
Attending today’s ChatShaala was a reminder of how much science can happen through careful observation and honest questioning without expensive equipment or elaborate setups.
The most important thing I took away is that Moina is not just a microscopic organism to be studied in isolation; it is an organism embedded in an ecosystem, and the water it lives in tells the story of that ecosystem. The distinction between borewell water, open well water, and chlorinated municipal water is not a trivial technical detail;l it is a biological variable with real consequences for whether the culture thrives or collapses.
I also came to appreciate the significance of the transfer chain. The fact that Kajal Kumari physically carried the Moina from CHM College to HBCSE represents something meaningful: the continuity of a living culture depends on human care and collaboration. Science at this level is not done by machines or automated systems; it is done by people who take responsibility for a living thing and move it carefully from one place to another.
The identification of Moina macrocopa JSK 1 as TCDS, The Chosen Daphnia Species, made me reflect on what it means to choose a model organism. Every choice involves trade-offs: what you gain in ease of culture, you may lose in generalisability. CUBE’s decision to work with this particular strain signals an intention to build a shared reference point across a distributed research community.
Finally, today reinforced that CUBE ChatShaala is as much about building a community of practice as it is about doing science. Participants from Ranchi, Kerala, and Mumbai sitting together (virtually) to trace the journey of a tiny water flea is, in its own way, a model for what citizen science can look like.
TINKE Moments (This I Never Knew Earlier)
TINKE 1 — The Water Source Is Not Neutral
Many participants (including myself, as I followed the discussion) likely assumed that any clean water would work for a Moina culture. The conversation around borewell water versus chlorinated municipal water made it clear that water chemistry matters deeply. The invisible chemistry of water, its chlorine content, mineral load, and dissolved oxygen, is not background noise; it is a critical experimental variable. I did not fully appreciate this before today.
TINKE 2 — Transport Is an Experiment in Itself
The transfer of Moina from CHM College to HBCSE in a water bottle sounds simple, but it raises questions that most of us had not considered: What happens to the population during transit? Does the closed container become anoxic? Does the temperature shift cause stress? This moment revealed that the act of moving a culture is itself a scientific event worth documenting.
TINKE 3 — The Botanical Garden Tank as an Ecosystem
The water tank in the CHM College botanical garden is not just a container of water; it is a living environment shaped by sunlight, plant matter, seasonal changes, and microbial communities. Recognising it as an ecosystem rather than a mere collection point changes the questions we ask about the Moina found there.
TINKE 4 — Naming Matters in Science
The designation Moina macrocopa JSK 1 TCDS is not bureaucratic labelling. It is a scientific commitment: this is the organism we agree to study, compare, and build knowledge around. Before today, I had not thought carefully about why choosing a specific strain and naming it clearly is foundational to collaborative research. Without a shared reference organism, comparisons across labs and cities become meaningless.
Gaps and Misconceptions
Gap 1 — Water Quality Parameters Are Underdocumented
The discussion raised the comparison between borewell and chlorinated water, but it was not clear whether participants had measured or recorded specific parameters such as pH, dissolved oxygen, total dissolved solids, or chlorine levels. Without these baseline measurements, it is difficult to attribute differences in Moina behaviour to any particular water variable. This is a gap that future sessions should address by encouraging systematic water quality testing alongside culture observations.
Gap 2 — Population Count at Transfer Not Mentioned
There was no mention of how many Moina individuals were present in the sample when it left CHM College, and how many survived the journey to HBCSE. Establishing a survivorship baseline during transport would be valuable, both for understanding Moina’s resilience and for refining protocols for future transfers across the CUBE network.
Gap 3 — Misconception That Collected Water Equals Pure Culture
There is a potential misconception worth flagging: collecting water from the botanical garden tank and establishing a “Moina culture” from it does not guarantee that the culture contains only Moina. The tank likely harbours other microorganisms, rotifers, copepods, algae, and bacteria that may compete with or support the Moina population. Participants should be aware that what begins as a mixed community culture may behave differently from a purified single-species culture, and observations should be interpreted accordingly.
Gap 4 — Role of Algae as Food Source Not Fully Explored
While the water quality discussion was rich, there was limited focus on what Moina is feeding on in the culture. In the botanical garden tank, algae and detritus would provide natural nutrition. In a lab bottle with tap or borewell water, this food source may be absent. Are participants adding yeast, algal paste, or green water to their cultures? This nutritional variable is as important as water chemistry, and it deserves dedicated discussion in a future session.
Gap 5 — Geographic Variation in Culture Success
With participants from Ranchi, Kerala, and Mumbai, there is an untapped opportunity to compare Moina culture outcomes across different water sources and climatic conditions. No systematic comparison framework appeared to have been established yet. Building one, even informally, could turn the distributed nature of CUBE into a genuine comparative study.
Referance