Privacy Policy

1. Client-Side Calculation Architecture

Unlike traditional web tools that transmit user inputs to remote backend databases, Aquarium Calculator Pro runs 100% client-side inside your web browser.

When you enter tank dimensions, calculate substrate weight, test DIN 32622 glass structural safety, balance bioload stocking combinations, or calculate heater wattage, all calculations are executed locally using client-side JavaScript. Your custom aquarium dimensions, fish species selections, and tank volume calculations are never transmitted, saved, or logged on our web servers.

2. Information We Do Not Collect

Because our platform is engineered with a privacy-by-design approach:

• No User Accounts: We do not require account registration, passwords, phone numbers, or social logins to access any calculator tool.
• No Aquarium Configurations Stored: We do not store, catalog, or profile your private aquariums, livestock lists, or project blueprints on remote servers.
• No Financial Data: All calculators and tools are 100% free. We never request credit card numbers, billing addresses, or payment credentials.

3. Google AdSense & Third-Party Advertising Disclosures

To maintain our calculators, hosting infrastructure, and species databases as a free public utility, we partner with third-party advertising networks, primarily Google AdSense.

Please review the following mandatory disclosures regarding third-party advertising cookies and tracking technologies:

• Third-Party Vendor Cookies: Third-party vendors, including Google, use cookies, web beacons, and device identifiers to serve ads based on a user's prior visits to this website or other websites across the Internet.
• Advertising Cookies: Google's use of advertising cookies enables it and its partners to serve ads to users based on their visits to Aquarium Calculator Pro and/or other sites on the World Wide Web.
• Personalized Advertising Opt-Out: Users may opt out of personalized advertising at any time by visiting Google's official Google Ads Settings.
• Industry-Wide Opt-Out Tools: You can also opt out of third-party vendor cookies for personalized advertising by visiting the Digital Advertising Alliance (www.aboutads.info) or the Network Advertising Initiative (NAI) Opt-Out Consumer Choice page. European visitors may opt out via the European Interactive Digital Advertising Alliance at Your Online Choices.

4. Technical Cookies & Local Storage

Aquarium Calculator Pro utilizes minimal local browser storage to remember your operational preferences between sessions:

• Unit System Preference: If you toggle between Metric (cm, Litres, kg, Celsius) and US Imperial (inches, Gallons, lbs, Fahrenheit), this preference is stored in your browser's localStorage so you do not need to reset it on subsequent visits.
• Language Preference: If you choose an alternate display language via our locale switcher, that language preference key is retained in localStorage.

You can clear your browser's cookies and local storage at any time via your browser settings without impacting your ability to use the calculators.

5. Web Analytics & Aggregated Performance Data

We use industry-standard web analytics (such as anonymized Google Analytics) to understand aggregate traffic volume, page load performance across mobile and desktop devices, and popular tools.

These analytics tools collect technical telemetry such as browser type, operating system, referring URL, time spent on pages, and anonymized IP addresses. This aggregate telemetry is used strictly to optimize site speed, verify mobile responsiveness, and prioritize new calculator feature development.

6. California Consumer Privacy Act (CCPA / CPRA)

If you are a California resident, the California Consumer Privacy Act (CCPA) and California Privacy Rights Act (CPRA) provide you with specific rights regarding personal information:

• Right to Know: You have the right to request disclosure of what personal data categories are collected and used.
• Right to Delete: You have the right to request deletion of personal information collected from you.
• Right to Opt-Out of Sale or Sharing: We do not sell your personal information. As noted above, you may opt out of personalized third-party advertising cookies via AboutAds Choices.
• Non-Discrimination: We will never discriminate against any user for exercising their privacy rights.

7. European Union & UK General Data Protection Regulation (GDPR)

For visitors residing in the European Economic Area (EEA) and the United Kingdom:

• Lawful Basis for Processing: We process minimal technical analytics data and non-essential cookies based on legitimate interests and user consent where applicable.
• Your Data Rights: Under the GDPR, you have the right to access, rectify, restrict processing of, or request erasure of personal data, as well as the right to lodge a complaint with your national supervisory data protection authority.

8. Children's Online Privacy Protection (COPPA)

Aquarium Calculator Pro is a general-audience educational engineering and hobbyist resource. We do not knowingly collect personal identifiable information from children under the age of 13. If you believe a child has provided us with personal information, please contact us immediately, and we will take prompt corrective action.

9. Policy Updates

We may periodically update this Privacy Policy to reflect advancements in our calculator tools or evolving regulatory requirements. Any modifications will be posted directly to this page with an updated revision date.

10. Contact Us Regarding Privacy

If you have any questions, suggestions, or formal data privacy inquiries concerning this policy, please contact our data compliance coordinator: