Free
Your first good care habit.
Start free with 2 tanks, 1 quarantine setup, and 10 TankAI lookups per day.
Know what your aquarium needs today.
Track water tests, remember maintenance, and keep every tank’s care history in one place.
Start free with 2 tanks, 1 quarantine setup, and 10 TankAI lookups per day.
At home. At the tank. With you.
Free aquarium calculators
Plan water changes, mix brackish water, and estimate your setup. Nine free tools, no account required.
- Aquarium water volume calculatorEstimate actual water in a rectangular aquarium from internal dimensions, water height and solid displacement, in liters and US gallons.
- Nitrate reduction and water change plannerEstimate one or repeated equal water changes for a nitrate target, including replacement-water nitrate and actual aquarium volume.
- Brackish water mixing calculatorPlan a batch from two measured salinities, or calculate the replacement-water salinity needed for a chosen tank change.
Beauty, backed by daily care.
See what is due, open the right tank tools, and ask a question with your aquarium details close by.
Today
Know what needs you.
Open Today to see overdue care and the tanks that need your attention.
- See the tank that needs attention without opening every record
- Check today’s tasks and recent care before deciding what to do next
Tank workspaces
Keep the whole story.
Open a tank to log a water test, record care, or find the calculator you need.
- Move from a tank to the calculator, care, test, or planning tool it needs
- Keep freshwater, reef, planted, pond, and quarantine setups readable together
TankAI and tools
Choose your next step.
Ask TankAI about your aquarium with the selected tank and suggested questions in view.
- Ask with the tank setup and recent state still visible
- Move from an answer into the right care, stocking, testing, or equipment workflow
Your aquarium. Your way of keeping it.
From your first planted tank to a room full of reefs, find the care workflow that fits.
Freshwater and planted
Start simple. Add depth when the tank needs it.
Keep feeding, routine maintenance, plants, livestock, and water tests in one approachable tank workspace.
- Daily feeding and care rhythm
- Water tests and planted context
- Beginner-friendly simple mode
Free to begin. Room to grow.
Pro
More depth for your daily care.
TankForge starts with core care tracking for real aquariums. Pro adds unlimited tanks, smart alerts, care plans, product scanning, vacation support, reports, exports, and deeper workflows.
Guidance should show its work.
First-party website attribution, on-device processing where supported, and published care limits keep the trust story close to the product.
No third-party advertising pixels
Clear confidence labels and care limits
Your next good aquarium habit.
Aquarium maintenance log
TankForge turns maintenance into a readable history so you can see what happened, what is due, and which tank needs attention next.
Aquarium water parameter tracker
TankForge helps you log readings, spot stale tests, and connect water changes to the actual tank record before drift becomes expensive.
Shared aquarium care planner
TankForge turns shared fish care into a plan with schedules, context, and helper-friendly handoff instead of a last-minute text thread.
Explore the latest changes
Daily care is clearer and more reliable.
TankForge 2.4.5 has been approved by Apple. Availability may vary while the App Store updates.
Care check-ins from Today
Explore 17 signs grouped by topic, with optional details and a photo.
Keep your draft
Your draft stays in place while you explore other signs.
Clearer everyday entry
Watch layouts and water-test entry are clearer.
A little more clarity.
What is the best app for managing an aquarium?
TankForge is built as an aquarium management app for fish keepers who want a Today command center, tank cockpits, water tests, maintenance logs, livestock, equipment, photos, compatibility context, build planning, and TankAI in one workflow.
Can TankForge manage reef tanks and saltwater aquariums?
Yes. TankForge supports saltwater and reef tank workflows, including reef chemistry tracking, maintenance history, livestock and equipment records, controller context, care reminders, and planning tools for more advanced aquarium setups.
Does TankForge work for freshwater and planted fish tanks?
Yes. TankForge supports freshwater and planted tanks with water parameter logging, test strip scanning, maintenance routines, livestock and plant records, compatibility context, reminders, and planted tank troubleshooting tools.