At a glance
Reef overview
Latest water tests
Your most recent manual results against your own target ranges.
What needs attention
Simple observations, not a diagnosis.
Upcoming maintenance
Due and overdue tasks.
Recent reef activity
Water tests, maintenance, livestock and diary notes together.
Manual tracking
Water tests
Log results from any test kit and see trends over time.
Test history
Newest result first.
Stay consistent
Maintenance planner
Recurring jobs, due dates and completion history.
Your reef inhabitants
Livestock records
Keep fish, coral and invertebrate notes with photographs.
Your complete reef story
Diary & timeline
See tests, maintenance, livestock and observations in one place.
Useful without equipment
Reef calculators
Practical planning tools. Always check product instructions before making changes.
Water volume
Estimate rectangular display and sump volume.
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Water change
Work out replacement water and salt mix.
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Pump turnover
Compare actual flow with system volume.
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Electricity cost
Estimate equipment running cost.
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Personalise your reef
Targets & aquarium
Set your own ranges and aquarium details.
Target ranges
Starter targets are editable. Use ranges appropriate to your livestock and husbandry method.
Offline storage on this device
The app keeps a private browser copy of your latest Reef Journal data and any changes waiting to sync. Cloud records are not removed when this local copy is cleared.
Delete aquarium
This permanently removes its tests, maintenance, livestock, diary entries and photos.