Privacy Policy

Last updated 8 June 2026

This Privacy Policy explains how aquariumtools ("we", "us", "the service") collects, uses, and protects your personal data when you use the website and the calculators, accounts, and tank journal we provide.

We take your privacy seriously. The calculators work entirely in your browser and need no account. We only collect personal data when you choose to create an account or contact us.

Who is responsible for your data

The data controller is:

You can contact us at any time at the email above for any question about this policy or your data.

What data we collect

Data you give us when you create an account. When you register, we store your email address and a securely hashed version of your password. If you sign in with Google, Facebook, or Apple, we receive your name and email address from that provider so we can create or match your account; we never receive your social-network password.

Data you create while using the service. If you keep a tank journal, we store the tanks, log entries, measurements, and any photos you upload. This content belongs to you and is only used to provide the service to you.

Technical data. Like most websites, our servers keep short-lived logs that may include your IP address, browser type, and the pages you request. We also use an error-monitoring tool to record technical details when something breaks, so we can fix it.

Analytics. We use Umami, a privacy-friendly analytics tool, to understand which pages are visited and how the site performs. Umami collects aggregated, non-identifying usage data and does not use tracking cookies or build advertising profiles.

We do not sell your personal data, and we do not use it for advertising.

Why we use your data and our legal basis

Under the EU General Data Protection Regulation (GDPR), we process your data on the following legal bases:

Cookies

We keep cookies to a minimum. Essential cookies are needed to sign you in and to protect forms; some third-party tools we rely on (such as Google reCAPTCHA and social sign-in) may set their own cookies. For full details, see our Cookie Policy.

Who we share your data with

We share data only with the service providers (processors) we need to run aquariumtools, and only to the extent necessary:

Each of these providers acts under a data-processing agreement or equivalent terms and may only use the data to provide their service to us.

International data transfers

Your account data and uploaded content are stored within the European Union. Some of the providers above (for example Sentry, Google, Meta, and Apple) may process limited data outside the European Economic Area, in particular in the United States. Where that happens, the transfer is protected by appropriate safeguards such as the European Commission's Standard Contractual Clauses and/or the providers' certification under the EU-US Data Privacy Framework.

How long we keep your data

You can ask us to delete your account and data at any time.

Your rights

Under the GDPR you have the right to:

To exercise any of these rights, email us at hello@aquarium.tools. You also have the right to lodge a complaint with the Italian Data Protection Authority (Garante per la protezione dei dati personali, www.garanteprivacy.it) or your local supervisory authority.

How we protect your data

We use appropriate technical and organisational measures to protect your data, including encrypted connections (HTTPS), hashed passwords, and access controls. No method of transmission or storage is completely secure, but we work to keep your data safe.

Children

The service is not directed at children under 16. We do not knowingly collect personal data from children. If you believe a child has given us personal data, please contact us and we will delete it.

Changes to this policy

We may update this Privacy Policy from time to time. When we make material changes, we will update the "last updated" date at the top of this page and, where appropriate, notify you.

Contact

For any question about this policy or your personal data, contact us at hello@aquarium.tools.