# Aquarium Planner & Tank Math — Tank Volume, Dosing, Changes

> Aquarium dimensions, volume, surface area, and weight calculator with unit converters. (iPhone/iPad app by Verosocial Studio.)

- Source: https://appshunter.io/ios/app/aquarium-planner-and-tank-math/id432881871 (this page in markdown: same URL + `.md`)
- Developer: [Verosocial Studio](https://appshunter.io/developer/354566841)
- Category: Utilities, Reference
- Price: Free with in-app purchases (on sale, was $0.99)
- Rating: 5.00/5 from 3 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 12 MB
- Languages: American English
- Released: 2011-04-29
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/aquarium-planner-and-tank-math/id432881871/reviews.md

## What is Aquarium Planner & Tank Math?

You are the kind of aquarium keeper who notices the small details: a nitrate shift, a missed filter cleaning, a new fish settling in, or a dose that needs to be checked twice. Aquarium Planner & Water Math is built for that careful style of fishkeeping, giving you one local-first place to track tanks, log care, and run the numbers before you act.

Use it when you need a quick answer at the tank: how many gallons a setup holds, how much water a change requires, what a dose should be, how recent test results are trending, or which maintenance task is due next. It supports freshwater, planted, saltwater, reef, quarantine, hospital, breeding, and pond workflows without forcing you into a complicated account system.

Plan and Track Your Aquariums
- Create aquarium records for active tanks.
- Track water type, volume, units, setup details, and notes.
- Review dashboard cards for current tank status and due work.
- Keep fish, plant, equipment, and treatment details organized by tank.
- Preserve readable history even when Pro access changes.

Log Water Tests and Maintenance
- Record ammonia, nitrite, nitrate, pH, KH, GH, temperature, and salinity.
- Log filter cleaning, gravel vacuuming, carbon changes, light replacement, dosing, and other maintenance.
- Track water change plans and completed changes.
- Review timelines, summaries, sparse data notes, and outlier warnings.
- Use free-tier caps for core records, with Aquarium Pro available for expanded tracking.

Aquarium Calculators
- Tank size and volume calculators for rectangular, hexagon, cylinder, half-cylinder, and quarter-cylinder tanks.
- Surface area and water weight estimates.
- Setup planning for substrate and water weight.
- Water change calculator for nitrate target planning.
- Chemical dosing calculator for common aquarium workflows.
- Stocking helper for quick fish-per-gallon estimates.

Unit Converters
- Pressure: psi, kPa, bar, and atm.
- Temperature: Celsius, Fahrenheit, and Kelvin.
- Volume: US gallons, Imperial gallons, liters, cubic inches, and cubic centimeters.
- Flow rate: US gph, US gpm, L/h, and L/min.

References and Fish Care
- Fish care profiles for quick lookup.
- Water parameter ranges for freshwater, planted, saltwater, and reef systems.
- Nitrogen cycle notes.
- Water change guidance.
- Acclimation basics.
- Compatibility and emergency troubleshooting reminders.

Local-First Data
Aquarium Planner & Water Math stores aquarium records locally on your device. Aquarium Pro includes local JSON backup export and restore tools for moving simplified Aquarium records between installs or devices. Backup files include aquariums, water tests, maintenance events, fish, plants, equipment, treatments, water change plans, and achievements. Photos, expense records, and CSV payloads are not part of the current backup package.

Aquarium Pro
Aquarium Pro unlocks expanded limits and advanced tools. The app supports a monthly auto-renewing subscription and a lifetime one-time purchase. Restore Purchases is available for users who reinstall or move to a new device. Existing records remain readable if Pro access changes.

Built for Repeat Care
Aquarium care depends on small, repeated actions: testing water, planning changes, checking equipment, dosing carefully, and reviewing what changed since last week. This app keeps those numbers and records in one practical workspace so maintenance decisions start from better context.

Aquarium Planner & Water Math does not replace species research, quarantine protocol, product instructions, or veterinary guidance. It provides calculations, logs, and reference material to support more consistent aquarium care. Use it tank-side.

## Key features

- Volume, surface area, and weight calculation
- Supports multiple aquarium shapes
- Customizable salinity
- Unit conversion tools
- Email calculations
- Saves user inputs

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Pro Unlock | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro Unlock | $14.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/aquarium-planner-and-tank-math/id432881871/reviews.md

### 5/5 — Useful for tanks and calculating

*2026-07-22*

Much improved over the last few versions. Looking forward to what comes next as well

### 5/5 — Great app for fish tank measurements

*2022-03-22*

Also good for shopping at the store and checking measurements

### 5/5 — So useful its hard to believe!

*2015-04-25*

Does everything you can imagine, calculating volume etc. from any measure you may have at hand. Very helpful in calculating necessary filter size, UV size etc.

### 5/5 — Aquarium app

*2012-10-18*

Great app, helps when buying used tanks. Get the measurement's and know how many gallons it really is.

### 5/5 — Very good

*2012-06-10*

This app helped me a lot

### 5/5 — So easy

*2012-05-06*

This app does exactly what it says, more info than you could possibly need, and customer service that is prompt and attentive to any issues. No more googling a gallon conversion site!!

### 5/5 — Idea for up-date.

*2011-12-19*

A Great app, very useful and well thought out. Please may i make a suggestion. I'm based in the U.K, and my job involves working with aquariums everyday. It would be useful if the default setting of U.S gallons / litres could be switched to U.K gallons and litres. I know you have included a conversion to U.K gallons; it would just be useful to have it on the main screen. Perhaps you could consider this for a future update ? 
 
Hey guys, i don't know how much my suggestion persuaded you to do an update regarding imperial measurements on the main screen; but you've done it !!!!!!!!!! Fantastic, works really well and is easy to use. Many thanks for listening.

## Frequently asked questions about Aquarium Planner & Tank Math

### What aquarium shapes does Aquarium Size,Area Calculator support?

Aquarium Size,Area Calculator supports rectangular, hexagon, cylinder, half cylinder, and corner quarter cylinder aquariums. This allows for precise calculations across a variety of tank designs.

### Can I calculate aquarium weight with Aquarium Size,Area Calculator?

Yes, Aquarium Size,Area Calculator calculates the weight of your aquarium, including the water and salinity. This is useful for understanding the structural requirements for your tank setup.

### Does Aquarium Size,Area Calculator offer unit conversions?

Yes, it includes converters for area, distance, flow rate, pressure, temperature, and volume. It also handles conversions between US/Imperial and metric units, providing flexibility for users worldwide.

### How does Aquarium Size,Area Calculator handle salinity?

You can input and save custom salinity values, which default to 1.0. This feature ensures accurate calculations for saltwater or specific freshwater setups.

### Can I share my calculations from Aquarium Size,Area Calculator?

Yes, you can easily send your calculations and conversions via email directly from the app. This is convenient for sharing plans or results with others.

### Is Aquarium Size,Area Calculator available on multiple Apple devices?

Yes, it is a Universal App, meaning it is compatible with iPhone, iPod Touch, and iPad. It also supports all iPhone screen sizes and Retina Display graphics.

### Does Aquarium Size,Area Calculator require an internet connection?

No, Aquarium Size,Area Calculator does not require network connectivity to function. All calculations and conversions can be performed offline.

### How often is Aquarium Size,Area Calculator updated?

The app was last updated on March 22, 2022, with version 7.5. It supports the latest version of iOS, indicating ongoing maintenance and compatibility.

## Version history (last 5 releases)

### 9.5 — 2026-07-22

Thank you for using Aquarium Planner. You already do the hard part: you show up for your aquarium again and again, checking water, feeding carefully, noticing behavior, and keeping the system stable. This update is built for that steady attention, expanding Aquarium Planner & Water Math from a calculator-focused tool into a fuller care workspace for repeat tank maintenance.

New Aquarium Tracking
- Added live tank records with dashboard cards and tank detail views.
- Added support for tank type, water type, volume, units, notes, and status summaries.
- Added logbook workflows for water tests, maintenance, and water changes.
- Added livestock, plant, equipment, and treatment tracking.
- Added readable history behavior for records that should remain visible when Pro access changes.

Better Water Testing
- Added water test records for ammonia, nitrite, nitrate, pH, KH, GH, temperature, and salinity.
- Improved summaries for recent readings and abnormal values.
- Added sparse data notes so one or two readings are not presented like a full trend.
- Added outlier handling and clearer result language.
- Improved same-day ordering for backfilled logs.

Maintenance and Water Changes
- Added maintenance event logging for filter cleaning, gravel vacuuming, carbon replacement, lighting, dosing, and other routine work.
- Added water change plans and completion tracking.
- Improved next-due handling and validation around maintenance dates.
- Added clearer warnings for impossible or future-dated records.
- Improved free-tier record cap messaging.

Calculators and Converters
- Kept core aquarium calculators: tank volume, surface area, water weight, setup planning, water change planning, chemical dosing, and stocking help.
- Improved result readability for longer labels and values.
- Improved reset, share, and saved-input behavior across calculator screens.
- Improved pressure, temperature, volume, and flow converter consistency.
- Refined edge cases for nitrate targets, zero values, invalid input, and partial entries.

References and Fish Care
- Added fish care lookup surfaces.
- Added water parameter ranges for freshwater, planted, saltwater, and reef tanks.
- Added nitrogen cycle notes, water change guidance, acclimation basics, compatibility reminders, and emergency troubleshooting advice.

Layout and Accessibility
- Improved Settings so content scrolls instead of crowding on compact screens.
- Improved key/value rows so long labels and values align or stack more predictably.
- Reduced unnecessary truncation in list and card text.
- Centralized decorative backgrounds so screens scale better on iPhone, iPad, landscape, and split view.

Quality Fixes
- Fixed DateTools collection end-date recomputation.
- Removed reachable placeholder and coming-soon surfaces from production routes.
- Cleaned stale expense references from active metadata and old sprint notes.
- Improved backup restore handling for future warranty dates.

Thanks for taking aquarium care seriously enough to track the details. This release is designed to make those details easier to record, review, and act on without turning maintenance into busywork.

### 9.4 — 2026-06-12

You already do the hard part: you show up for your aquarium again and again, checking water, feeding carefully, noticing behavior, and keeping the system stable. This update is built for that steady attention, expanding Aquarium Planner & Water Math from a calculator-focused tool into a fuller care workspace for repeat tank maintenance.

New Aquarium Tracking
- Added live tank records with dashboard cards and tank detail views.
- Added support for tank type, water type, volume, units, notes, and status summaries.
- Added logbook workflows for water tests, maintenance, and water changes.
- Added livestock, plant, equipment, and treatment tracking.
- Added readable history behavior for records that should remain visible when Pro access changes.

Better Water Testing
- Added water test records for ammonia, nitrite, nitrate, pH, KH, GH, temperature, and salinity.
- Improved summaries for recent readings and abnormal values.
- Added sparse data notes so one or two readings are not presented like a full trend.
- Added outlier handling and clearer result language.
- Improved same-day ordering for backfilled logs.

Maintenance and Water Changes
- Added maintenance event logging for filter cleaning, gravel vacuuming, carbon replacement, lighting, dosing, and other routine work.
- Added water change plans and completion tracking.
- Improved next-due handling and validation around maintenance dates.
- Added clearer warnings for impossible or future-dated records.
- Improved free-tier record cap messaging.

Calculators and Converters
- Kept core aquarium calculators: tank volume, surface area, water weight, setup planning, water change planning, chemical dosing, and stocking help.
- Improved result readability for longer labels and values.
- Improved reset, share, and saved-input behavior across calculator screens.
- Improved pressure, temperature, volume, and flow converter consistency.
- Refined edge cases for nitrate targets, zero values, invalid input, and partial entries.

References and Fish Care
- Added fish care lookup surfaces.
- Added water parameter ranges for freshwater, planted, saltwater, and reef tanks.
- Added nitrogen cycle notes, water change guidance, acclimation basics, compatibility reminders, and emergency troubleshooting advice.

Layout and Accessibility
- Improved Settings so content scrolls instead of crowding on compact screens.
- Improved key/value rows so long labels and values align or stack more predictably.
- Reduced unnecessary truncation in list and card text.
- Centralized decorative backgrounds so screens scale better on iPhone, iPad, landscape, and split view.

Quality Fixes
- Fixed DateTools collection end-date recomputation.
- Removed reachable placeholder and coming-soon surfaces from production routes.
- Cleaned stale expense references from active metadata and old sprint notes.
- Improved backup restore handling for future warranty dates.

Thanks for taking aquarium care seriously enough to track the details. This release is designed to make those details easier to record, review, and act on without turning maintenance into busywork.

### 9.3 — 2026-06-11

You already do the hard part: you show up for your aquarium again and again, checking water, feeding carefully, noticing behavior, and keeping the system stable. This update is built for that steady attention, expanding Aquarium Planner & Water Math from a calculator-focused tool into a fuller care workspace for repeat tank maintenance.

New Aquarium Tracking
- Added live tank records with dashboard cards and tank detail views.
- Added support for tank type, water type, volume, units, notes, and status summaries.
- Added logbook workflows for water tests, maintenance, and water changes.
- Added livestock, plant, equipment, and treatment tracking.
- Added readable history behavior for records that should remain visible when Pro access changes.

Better Water Testing
- Added water test records for ammonia, nitrite, nitrate, pH, KH, GH, temperature, and salinity.
- Improved summaries for recent readings and abnormal values.
- Added sparse data notes so one or two readings are not presented like a full trend.
- Added outlier handling and clearer result language.
- Improved same-day ordering for backfilled logs.

Maintenance and Water Changes
- Added maintenance event logging for filter cleaning, gravel vacuuming, carbon replacement, lighting, dosing, and other routine work.
- Added water change plans and completion tracking.
- Improved next-due handling and validation around maintenance dates.
- Added clearer warnings for impossible or future-dated records.
- Improved free-tier record cap messaging.

Calculators and Converters
- Kept core aquarium calculators: tank volume, surface area, water weight, setup planning, water change planning, chemical dosing, and stocking help.
- Improved result readability for longer labels and values.
- Improved reset, share, and saved-input behavior across calculator screens.
- Improved pressure, temperature, volume, and flow converter consistency.
- Refined edge cases for nitrate targets, zero values, invalid input, and partial entries.

References and Fish Care
- Added fish care lookup surfaces.
- Added water parameter ranges for freshwater, planted, saltwater, and reef tanks.
- Added nitrogen cycle notes, water change guidance, acclimation basics, compatibility reminders, and emergency troubleshooting advice.

Layout and Accessibility
- Improved Settings so content scrolls instead of crowding on compact screens.
- Improved key/value rows so long labels and values align or stack more predictably.
- Reduced unnecessary truncation in list and card text.
- Centralized decorative backgrounds so screens scale better on iPhone, iPad, landscape, and split view.

Quality Fixes
- Fixed DateTools collection end-date recomputation.
- Removed reachable placeholder and coming-soon surfaces from production routes.
- Cleaned stale expense references from active metadata and old sprint notes.
- Improved backup restore handling for future warranty dates.

Thanks for taking aquarium care seriously enough to track the details. This release is designed to make those details easier to record, review, and act on without turning maintenance into busywork.

### 9.2 — 2026-05-08

This update focuses on practical speed and clearer aquarium math from the first tap to the final result. We reviewed the most common tasks keepers run every week and tightened the interaction flow so routine calculations take less effort.

New and Improved in This Version
- Added and polished calculator coverage for core aquarium planning and maintenance tasks.
- Improved tank geometry support for rectangular, hexagon, cylinder, half-cylinder, and quarter-cylinder layouts.
- Refined top surface area and volume outputs for cleaner at-a-glance reading.
- Improved weight estimation flow with salinity factor support.
- Added clearer setup planning outputs for substrate amount and water weight.

Better Water Change Planning
- Improved nitrate-target workflow so change percentages are easier to evaluate.
- Added approximate gallons-to-replace output alongside percent change.
- Better handling of edge cases when target nitrate is at or above current nitrate.
- Input persistence updates help frequent users avoid repetitive entry.

Better Chemical Dosing Workflow
- Improved dosing calculator behavior for common treatment categories.
- Cleaner output formatting for fast confirmation before dosing.
- Better saved-state behavior for repeat maintenance routines.
- Updated guidance text to keep product-specific dosing assumptions clear.

Stocking Helper Refinements
- Improved fish-per-gallon calculation feedback.
- Clearer bioload labels across light, moderate, heavy, and overstocked ranges.
- Better output readability during quick comparison checks.
- Faster reset and rerun flow when testing multiple stocking scenarios.

Converter Upgrades
- Improved pressure conversion consistency across psi, kPa, bar, and atm.
- Improved temperature conversion reliability across C, F, and K.
- Improved aquarium volume conversion flow across US/Imperial/metric units.
- Improved flow rate conversion behavior for gph, gpm, L/h, and L/min.
- Better consistency in result formatting across all converter screens.

Everyday Usability Improvements
- Reduced friction in the most-used input paths.
- Cleaner labeling and hierarchy to make results easier to scan.
- Better reset/share behavior across calculator screens.
- Faster re-entry during maintenance sessions.
- Small interaction polish across menus and action sheets.

Stability and Quality
- General performance improvements for smoother navigation.
- Better handling of invalid or incomplete input states.
- Reduced chances of confusing partial outputs.
- Minor bug fixes in calculations and state handling.
- Improved consistency of saved values in key tools.

Why This Update Matters
Aquarium care is full of repetitive numbers: gallons, liters, nitrate targets, pump rates, dosing amounts, and stocking limits. Small math mistakes can lead to wasted additives, unstable parameters, or unnecessary stress on fish and plants. This release is built to make those repetitive calculations faster, clearer, and easier to trust.

Continuing Direction
Development remains focused on practical aquarium maintenance tools with clear outputs, stable behavior, and fast repeat use. Upcoming updates will continue to improve calculator depth, result clarity, and workflow speed for both beginners and experienced keepers.

Thanks to everyone sharing real-world feedback from home fish rooms, planted tanks, reef systems, and service routes. Those notes directly shape what gets improved next.

### 9.1 — 2026-05-01

This update focuses on practical speed and clearer aquarium math from the first tap to the final result. We reviewed the most common tasks keepers run every week and tightened the interaction flow so routine calculations take less effort.

New and Improved in This Version
- Added and polished calculator coverage for core aquarium planning and maintenance tasks.
- Improved tank geometry support for rectangular, hexagon, cylinder, half-cylinder, and quarter-cylinder layouts.
- Refined top surface area and volume outputs for cleaner at-a-glance reading.
- Improved weight estimation flow with salinity factor support.
- Added clearer setup planning outputs for substrate amount and water weight.

Better Water Change Planning
- Improved nitrate-target workflow so change percentages are easier to evaluate.
- Added approximate gallons-to-replace output alongside percent change.
- Better handling of edge cases when target nitrate is at or above current nitrate.
- Input persistence updates help frequent users avoid repetitive entry.

Better Chemical Dosing Workflow
- Improved dosing calculator behavior for common treatment categories.
- Cleaner output formatting for fast confirmation before dosing.
- Better saved-state behavior for repeat maintenance routines.
- Updated guidance text to keep product-specific dosing assumptions clear.

Stocking Helper Refinements
- Improved fish-per-gallon calculation feedback.
- Clearer bioload labels across light, moderate, heavy, and overstocked ranges.
- Better output readability during quick comparison checks.
- Faster reset and rerun flow when testing multiple stocking scenarios.

Converter Upgrades
- Improved pressure conversion consistency across psi, kPa, bar, and atm.
- Improved temperature conversion reliability across C, F, and K.
- Improved aquarium volume conversion flow across US/Imperial/metric units.
- Improved flow rate conversion behavior for gph, gpm, L/h, and L/min.
- Better consistency in result formatting across all converter screens.

Everyday Usability Improvements
- Reduced friction in the most-used input paths.
- Cleaner labeling and hierarchy to make results easier to scan.
- Better reset/share behavior across calculator screens.
- Faster re-entry during maintenance sessions.
- Small interaction polish across menus and action sheets.

Stability and Quality
- General performance improvements for smoother navigation.
- Better handling of invalid or incomplete input states.
- Reduced chances of confusing partial outputs.
- Minor bug fixes in calculations and state handling.
- Improved consistency of saved values in key tools.

Why This Update Matters
Aquarium care is full of repetitive numbers: gallons, liters, nitrate targets, pump rates, dosing amounts, and stocking limits. Small math mistakes can lead to wasted additives, unstable parameters, or unnecessary stress on fish and plants. This release is built to make those repetitive calculations faster, clearer, and easier to trust.

Continuing Direction
Development remains focused on practical aquarium maintenance tools with clear outputs, stable behavior, and fast repeat use. Upcoming updates will continue to improve calculator depth, result clarity, and workflow speed for both beginners and experienced keepers.

Thanks to everyone sharing real-world feedback from home fish rooms, planted tanks, reef systems, and service routes. Those notes directly shape what gets improved next.

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All apps by Verosocial Studio: https://appshunter.io/developer/354566841

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*