This tool provides a general estimate and does not replace professional veterinary advice.
Updated · How we check our tools
What is the Tetra Nitrogen Cycle Tracker?
The Tetra Nitrogen Cycle Tracker tracks tank cycling progress through ammonia, nitrite and nitrate stages for new tetra tanks. Water quality is the single biggest factor in aquatic animal health. Far more animals are lost to poor water parameters than to disease introduced from outside.
Tetras generally live 3-6 years when they are well looked after. They are an omnivore, so their nutritional needs shift with age, size and activity. Tetras are schooling fish that become stressed and nippy in small numbers, so keep at least six of one species. They prefer soft, slightly acidic water with planted cover and subdued lighting. Keep an eye out for neon tetra disease, ich, fin rot. These are the conditions tetras are most commonly seen for.
Tetra quick facts
| Measure | Tetra |
|---|---|
| Typical lifespan | 3–6 years |
| Diet | Omnivore |
| Mature at | About 6 months |
| Clutch size | 300–500 eggs |
How does the Tetra Nitrogen Cycle Tracker work?
The figures are based on commonly cited aquarist rules of thumb and safe parameter ranges for tetras, scaled to your tank or livestock details. It is a starting point, not a verdict. Somebody who has actually examined your tetra will always know more than a formula does.
What affects the result
- Tank size and current stocking level
- Filtration capacity: which affects how much waste the system can safely process
- Feeding habits: since overfeeding is a leading cause of poor water quality
- Source water quality before treatment, which varies by location
How do you use the Tetra Nitrogen Cycle Tracker?
- Enter the current temperature in whichever unit you use (F, C)
- Answer "Where did you measure?"
- Pick your time of day (Daytime, Night-time)
- Press Calculate, then read the result alongside the sources listed below
Bring the number to your next appointment. Vets can work with a figure and a date far more easily than with "he seems a bit off lately".
For related questions, see the other water tools or browse every tetra tool.
Before you rely on this
One number on one day is rarely the full picture. What matters more is the direction of travel: whether your tetra is trending steadily, drifting, or changing suddenly. A sudden change is always worth a call to your vet, even when the individual figure still falls inside a normal range.
Sources and references
The formulas, reference ranges and species data behind the Tetra Nitrogen Cycle Tracker come from these veterinary references, professional bodies and published research.
- University of Florida IFAS ExtensionAquacultureedis.ifas.ufl.edu(opens in a new tab)
- Merck Veterinary ManualReptilesmerckvetmanual.com(opens in a new tab)
- ARAVAssociation of Reptilian and Amphibian Veterinariansarav.org(opens in a new tab)
- Merck Veterinary ManualExotic and Laboratory Animalsmerckvetmanual.com(opens in a new tab)
- Merck Veterinary ManualRoutine Care and Breedingmerckvetmanual.com(opens in a new tab)
- Built on veterinary referencesFormulas and ranges come from veterinary manuals, university research and welfare bodies, listed above for you to check.
- Instant resultsNo page reload, no waiting and no account. Enter your details and the result appears straight away.
- Private by designCalculations run in your browser. Nothing you enter is stored on our servers or shared with anyone.
- Always freeEvery XpertsPet tool is free to use, with no premium tier and nothing to sign up for.