Privacy Policy

Overview

Dial-In CO2 ("this site," "we," "us") is a free calculator and reference tool for planted-aquarium hobbyists. You do not need to create an account, register, or provide any personal information to use the calculator, read the guides, or otherwise use this site.

Information We Collect

We do not collect names, email addresses, payment information, or any information you might type into the calculator itself — your tank size, pH, and KH values are processed entirely in your own browser and are never sent to us or stored anywhere. The only information collected automatically, and only where described below, is:

• Cookies and similar identifiers set by Google AdSense, used to serve and measure the ads that appear on this site.
• Standard technical data that Google AdSense collects as part of serving those ads, such as browser type, device type, and approximate location derived from IP address.

Cookies

Cookies are small text files stored on your device. This site does not use cookies for its own functionality — the calculator runs entirely client-side. The only cookies on this site come from Google AdSense, for ad delivery and measurement.

If our systems detect you are likely visiting from the EEA or UK, you are shown a cookie banner before any advertising cookies are set. Choosing "Accept" allows AdSense cookies to load; choosing "Decline" means no advertising cookies are set on your device for that visit, and your choice is remembered so the banner does not reappear on future visits. If you are visiting from outside these regions, advertising cookies may be set without a banner, consistent with local requirements. You can also block or delete cookies at any time through your browser's own settings.

Third-Party Services

We use Google AdSense to display advertising on this site. Google may use cookies to serve ads based on your prior visits to this or other websites, and may collect data as described in Google's own privacy policy. You can learn more about how Google uses this data and manage your ad personalization settings at google.com/settings/ads or aboutads.info/choices. We do not use any analytics, tracking, or advertising service other than Google AdSense.

Your Choices

Because this site does not collect personal information directly and does not require an account, there is no personal data held by us for you to access, correct, or delete. Your choices about advertising cookies are exercised through the cookie banner described above (where shown), through your browser's cookie settings, or directly with Google through the links above.

Children's Privacy

This site is not directed at children under 13, and we do not knowingly collect personal information from children. Since the site requires no registration and collects no personal information from any visitor, no child-specific data is collected.

Changes to This Policy

We may update this policy from time to time as the site or its advertising setup changes. Any changes will be posted on this page with an updated "Last updated" date above.

Contact

Questions about this policy can be sent to [email protected].