Common Neocaridina claims checked
Not a list for winning arguments. Each answer preserves the useful part of a familiar claim, removes the certainty the evidence cannot carry, and gives the keeper a next step.
Use the whole answer. Sharing only the verdict can create a new myth. Link the detailed guide when water, animals or treatment decisions are involved.
Jump to cycling time, TDS, water changes, molting, cleanup claims, fish, berried females, acclimation, stocking, colour and identity, copper, quarantine, mixed colours, or temperature.
"A tank is cycled after a fixed number of weeks"
What is supported: microbial nitrogen processing can become established in aquarium systems.
What is not established: age, nitrate, clear water or a bottled product alone does not prove that one tank can process its intended load.
Do next: test a known fishless challenge and preserve total-ammonia and nitrite reporting bases. Use the cycling guide.
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"A TDS number tells you whether the minerals are right"
What is supported: a meter can estimate TDS from conductivity using its conversion factor.
What is not established: the display does not reveal ionic composition, separate calcium and magnesium, GH, contaminants or a species optimum.
Do next: record meter mode and temperature basis, then measure the property the decision requires. Use the parameter guide.
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"Large water changes kill shrimp"
What is supported: a change can expose animals to differences in temperature, dissolved composition, pH, contaminants and gas state.
What is not established: percentage alone does not determine safety, and a tiny change is not automatically useful or harmless.
Do next: identify the purpose, compare source and tank water, calculate dilution and observe the result. Use the water-change guide.
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"A failed molt means the shrimp needs more calcium"
What is supported: mineral availability and water chemistry matter to exoskeleton biology.
What is not established: one incomplete molt identifies a calcium deficiency, proves low GH caused it or validates adding a mineral product.
Do next: distinguish the animal from an exuvia, measure immediate water hazards and preserve the event history. Use the molting guide.
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"Neocaridina clean the tank"
What is supported: Neocaridina graze algae, microbes, detrital material and food-associated surfaces.
What is not established: grazing guarantees control of a visible growth, replaces maintenance or exports the consumed nutrients from the aquarium.
Do next: identify the material and correct light, inputs or maintenance while treating shrimp as animals, not equipment. Use the grazing guide.
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"Peaceful fish are shrimp-safe"
What is supported: outcomes depend on the exact fish species, individual size, shrimp life stage, cover, feeding, intake protection and the tank's goal.
What is not established: a retailer temperament label predicts juvenile retention or preserves a breeding line.
Do next: decide whether the goal is adult display or colony recruitment, then evaluate the exact species. Use the tankmate guide.
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"A berried female guarantees babies"
What is supported: an ovigerous female is carrying attached eggs.
What is not established: the observation alone proves fertilization, viability, a hatch date or retained juveniles.
Do next: record the first observation, egg changes, hatch window, visible young and later retained cohort as separate events. Use the breeding guide.
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"Every shrimp should be drip acclimated for the same amount of time"
What is supported: source and receiving water can differ, and the opened package can continue changing during a transfer.
What is not established: one drip rate or clock time is best for every package, water comparison and animal state.
Do next: measure temperature and relevant dissolved-property differences, inspect the package and use a predefined transfer plan. Use the acclimation guide.
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"A tank can hold a fixed number of shrimp per gallon"
What is supported: density can affect outcomes under defined systems and feeding histories.
What is not established: tank volume alone reveals oxygen, grazing surface, waste-processing capacity, maintenance limit or sustainable reproduction.
Do next: begin with a supportable group, measure system outcomes and set an operation-specific intervention point. Use the stocking guide.
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"Colour proves the species or purity of a line"
What is supported: colour and pattern are observable phenotypes that can be recorded and graded under a method.
What is not established: one photograph or trade label proves species, genotype, pedigree, relatedness, hybrid status or genetic purity.
Do next: preserve scientific-name claim, identification basis, seller label, source, grade and provenance separately. Use the identity guide.
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"Any copper kills shrimp or copper is safe"
What is supported: copper is biologically relevant and can be toxic; effects depend on concentration, chemical form, water chemistry, exposure and endpoint.
What is not established: an ingredient name alone proves a product is lethal or safe, and one acute value is not a home target.
Do next: identify the product, dose, copper fraction, water context and measured animal outcome before acting. Use the chemical-safety guide.
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"A fixed quarantine period proves shrimp are clean"
What is supported: separating each new source contact network reduces opportunities to expose established animals and creates an observation window.
What is not established: one duration detects or clears every organism, proves pathogen-free status or validates routine prophylactic treatment.
Do next: use a commissioned separate system, dedicated wet equipment, recorded observations and a release decision. Use the quarantine guide.
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"Mixed colours always turn brown or clear in two generations"
What is supported: mixing undocumented breeding populations can reduce consistency when selection and records stop.
What is not established: every named-line cross has one phenotype or reaches it on a universal F1 or F2 calendar.
Do next: choose display or breeding as the goal, record parents and follow all offspring beyond one generation. Use the colour-crossing guide.
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"Warmer water always makes shrimp grow and breed better"
What is supported: temperature can change development, growth, sex allocation, reproductive timing and physiology under tested conditions.
What is not established: the fastest measured outcome is the best long-term welfare or colony temperature, or that one successful treatment defines a universal optimum.
Do next: separate the desired endpoint, tested range and house operating choice, then monitor the whole colony rather than speed alone. Use the temperature guide.
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Turn a correction into an invitation
Lead with what the keeper observed correctly, name the missing evidence, and give one next action. "You saw attached eggs; now record the hatch and retained-young denominators" teaches more than "that is a myth." The goal is another confident shrimp keeper, not a defeated commenter.
Need a term? Use the glossary. Need the full source boundary? Search the research map. Need a care sequence? Return to the guided paths. Need to answer a different community question? Use the bounded reply standard.