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The aquarium, done by the numbers
The aquarium, done by the numbers: the nitrogen cycle with actual figures — what ammonia, nitrite and nitrate should read at week one, three and six, and…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
The nitrogen cycle with actual figures — what ammonia, nitrite and nitrate should read at week one, three and six, and why the fish died in week two; stocking arithmetic that is not the inch-per-gallon myth; a page per common species with tank length, temperature, pH and hardness, cross-referenced to the tap-water hardness of the reader's own waterworks; the water-change schedule; algae types by appearance with the cause behind each; the common diseases and the treatments actually licensed here; and the hygiene page nobody writes, on fish-tank granuloma.
A focused example is "Cycling a new tank: what the test kit should say each week."
How to use it
Use The aquarium, done by the numbers to compare stable place facts and official facilities. Live opening, access and disruption information should always be confirmed with the operator before travel.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | akvaariumi tsükkel ammoniaak nitrit |
| Finnish | akvaarion typpikierto kesto |
| Russian | запуск аквариума с нуля сколько ждать |
| English | how long to cycle a new aquarium |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: published aquaculture and water-chemistry references, the national drinking-water registers for hardness by waterworks (open), veterinary literature on Mycobacterium marinum. · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
This guide owns the explanatory layer for the topic. Personal decisions, diagnoses, legal determinations and live availability remain with the relevant professional or official service.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
More Home
Continue to the related TempoLife reference.
More Water
Continue to the related TempoLife reference.
Why it belongs on TempoLife
/more/home for water hardness and /more/water.
Frequently asked questions
What does this guide cover?
The nitrogen cycle with actual figures — what ammonia, nitrite and nitrate should read at week one, three and six, and why the fish died in week two; stocking arithmetic that is not the inch-per-gallon myth; a page per common species with tank length, temperature, pH and hardness, cross-referenced to the tap-water hardness of the reader's own waterworks; the water-change schedule; algae types by appearance with the cause behind each; the common diseases and the treatments actually licensed here; and the hygiene…
What evidence does it use?
published aquaculture and water-chemistry references, the national drinking-water registers for hardness by waterworks (open), veterinary literature on Mycobacterium marinum.
Where does this guide stop?
It explains the topic and points to primary or official sources. It does not replace a qualified professional, an official decision, or advice based on your own circumstances.
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