Aquarium journal
Aquarium Journal: Water Log
A structured local journal for aquarium measurements, inhabitants, and events.
Free to download. Pro is optional.
This is a personal recordkeeping tool, not veterinary, toxicity, treatment, or emergency advice. Any experimental reference shown in the app is informational and must be evaluated independently.
Optional Pro
An optional one-time Pro purchase adds an annual report for each tank. Compare reading counts and ranges across the last 365 days and the preceding 365 days, and save a preferred parameter. The journal, reminders, photos, 7/30/90-day trends and exports stay free.
A practical workflow
When to use Aquarium Journal
- Keep separate records for each aquarium.
- Log measurements with their units and event context.
- Find inhabitants, notes and user-selected photos together.
Choose this app when its documented scope fits the task you want to keep on your iPhone. The free web resources below are independent alternatives for a single worksheet or calculation.
Before you choose
Does it diagnose fish or prescribe treatment?
No. It is a personal journal. Recorded values and any informational references are not veterinary, toxicity or treatment advice.
Can I export my records?
The documented app supports user-initiated CSV, JSON backup and PNG summaries. Use the app’s supported backup workflow; the web CSV is independent.
Does selecting a photo delete the original?
No. Selected images are copied into local app storage; removing the journal entry does not delete the original from Photos.
Use it without an app
Free resources for this activity
- Aquarium water-test log template
A free printable aquarium log and CSV worksheet for dated water-test results, units, tank names and event notes. Record observations without mixing units.
- Aquarium temperature and volume converter
Convert Celsius and Fahrenheit or litres and US gallons for an aquarium record. See the formula and keep original measurement units with each result.
- Aquarium water-change and event log
Record an aquarium water change or equipment event beside before-and-after test references. Printable event log and blank CSV, without treatment calculations.