Privacy policy
Short version: Aquarium Knowledge collects no personal data. Your calculations stay in your browser. No tracking, no advertising, no accounts.
Last updated: September 2026
Overview
Aquarium Knowledge (aquariumknowledge.com) is a free knowledge base for aquarium hobbyists. This policy explains what information the site handles — which is, by design, almost none. We do not sell anything, we do not require accounts, and we do not ask for your name, address, or payment details anywhere on the site.
Information we do not collect
We do not collect personal information. There is no signup, no login, no newsletter, and no comment form. We do not build advertising profiles, and we do not sell, rent, or share any visitor data with third parties.
Data stored in your own browser
Some tools — such as the aquarium volume calculator — can save your recent calculations (shape, dimensions, results) using your browser’s local storage so you can restore them later. This data never leaves your device: it is stored in your browser, readable only by this site on your computer, and you can clear it at any time through your browser settings or the tool’s own remove buttons.
Share links
The calculator offers a “Copy link” feature that encodes your inputs into the URL so you can share a specific calculation. The link contains only the numbers you entered — no identifiers, no cookies. Anyone you send the link to can see those inputs; anyone who intercepts it could too, so avoid including anything sensitive (there is normally nothing sensitive to include).
Server logs and analytics
Like nearly all websites, our hosting provider may keep short-lived technical logs (for example IP addresses and request timestamps) for security and to keep the site online. We do not use these logs to profile visitors. If we later add privacy-respecting, aggregate analytics, this policy will be updated first.
Cookies
Aquarium Knowledge sets no tracking or advertising cookies. If any strictly necessary cookie is ever introduced (for example for a future feature), it will be listed here.
Third-party services
Pages embed no third-party advertising or social-tracking scripts. Fonts are self-hosted. The site links to other websites (such as retailers, when we mention gear our contributors have tested); once you follow a link to another site, that site’s own privacy policy applies.
Children’s privacy
The site is safe for readers of all ages precisely because it collects nothing. We do not knowingly collect personal information from anyone, including children under 13.
Your rights
Because we hold no personal data about you, there is nothing for us to export, correct, or delete on your behalf — there is no account to delete and no profile to erase. Clearing your browser’s local storage removes every trace of your use of our tools.
Changes to this policy
If our practices change, we will update this page and the date below. The current version always lives at aquariumknowledge.com/privacy-policy/.
Contact
Questions about this policy? Email hello@aquariumknowledge.com.
Related: Terms & conditions· Contact us