Shrimp health: from observation to an appropriate next step

Start with what you actually observe and how quickly it is changing. Choose the appropriate route below, check water and equipment where needed, and record the course. Water problems and disease can coexist. This guide helps select what to investigate; it cannot diagnose an animal remotely.

Are animals deteriorating severely now?

For several suddenly affected animals, loss of balance or continuing deaths: restore obvious filter or aeration failure, stop a suspect addition and immediately use the emergency plan. Test temperature, ammonia and nitrite, with pH to interpret ammonia. Support gas exchange and seek timely help. Do not wait to investigate every possible cause.

Choose what you observe

Observation	What to record or measure	Next step
Several animals suddenly high in the tank or losing balance	Course, filter/CO2, temperature, ammonia, nitrite and oxygen if measurable	Check gas exchange; behaviour alone does not prove low oxygen.
Problems after a water change or addition	Tank and source water, preparation, temperature, pH, GH/KH, conductivity and products	Investigate the water change and trace possible exposure.
White haze in the water	Onset, bubbles/particles, maintenance, behaviour and nitrogen readings	Assess cloudy water; clarity is not a quality test.
One animal hiding or feeding differently	Its normal behaviour, species, food uptake, timing, photograph and group pattern	Assess behaviour; follow the course and escalate deterioration.
Empty shell, white ring or trapped animal	Empty casing versus body tissue, movement, recent changes and measured water	Recognise a molt or investigate a molting problem. Do not pull the shell away.
Growth or a new colour/patch on one animal	External or internal, location, shape, progression and comparable photographs	Choose a detailed route below; a colour or hobby label is not identification.
Repeated unexplained losses	Timeline, numbers, species, purchases, maintenance, measurements and actions	Investigate deaths and seek a targeted professional assessment.

Growths, patches or animals on the glass

Worm-like structures on the head or gill region: Scutariella and similar organisms.
White fuzz or bell-shaped growth: Vorticella and identification limits.
Green growth under the body: Cladogonium and confusion with fungus.
Whitening within the body: assess a milky appearance.
New patches or shell damage: colour versus lesions.
Polyps or gliding worms on glass or plants: hydra and planaria.

Make measurements useful

Record date, time, units, test type and sampling location, plus changes before the measurement. A result after water replacement does not precisely describe earlier conditions. GH and KH measure different things; TDS or conductivity does not identify individual substances. A normal routine panel cannot exclude an unknown toxin or infection. Use the water-choice guide for source water, remineralisation and changes.

Compare with the needs of the actual species and line. Neocaridina, Bee/Taiwan Bee and warm-water Sulawesi species do not share one correction target. Fan shrimp may normally sit in a current to feed. Do not confuse that with newly abnormal group behaviour, or automatically transfer fasting advice for grazing species.

Housing and treatment are separate decisions

Assess whether isolation is appropriate, including holding-water conditions, filtration and food. Choose treatment only with a specific target and support for its application. The medication checklist and explanation of salt dips help identify unsuitable general recipes. A suspected bacterial cause still requires targeted investigation.

Record the follow-up too

After action, record behaviour, relevant measurements and new losses. Improvement does not automatically prove a diagnosis; continuing deterioration requires reassessment. Remove confirmed carcasses and ask what is needed before collecting samples. Limit contact between aquaria through dedicated equipment and prepare for new arrivals in advance.

Sources and scope

This problem route is an editorial decision aid. It combines water chemistry, observation and targeted examination; a symptom does not establish a diagnosis here. Fish clinical sources supply no medication dose or threshold for every shrimp species. Individual articles explain evidence and uncertainty for each topic.