Privacy Policy
This site works without an account. Optional Google Analytics loads only after you allow analytics; the calculator, saved tanks and treatment planner work when you decline. Saved tanks and the treatment planner offer optional device storage. Calculation inputs are placed in the browser URL so navigation and editing can retain them. Anyone you share that URL with can read those inputs.
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Optional saved tanks
Remember my tanks stores tank names, water volumes and selected units in this browser only when you choose Save. It preserves the measurement method, dimension units and any explicit displacement estimate. It does not save products or doses with a tank. You can edit or delete individual tanks in the calculator. Tank names stay out of calculation links. Saved tanks and saved treatment plans use separate records; deleting a tank does not delete a plan. Clearing site data removes both. This feature has no account or cloud sync; other people using the same browser profile may be able to read saved records.
Optional treatment-plan saving
If you choose Save this plan on this device, the planner stores one calculation, its start date and any required start time/time zone, the source schedule snapshot and completion marks in this browser’s local storage. Nothing is sent to an account or cloud service, and no reminders are sent. Saving another plan replaces the previous one. Untick saving for the active saved plan or use Delete saved plan to remove it. Clearing site data also removes it. Other people using the same browser profile may be able to read it. Without saving, the checklist lasts only in the open tab.
Hosting and external links
The hosting provider may process ordinary access logs. Manufacturer links take you to external websites with their own privacy policies. Emailing us shares your email and message with our email provider.
Optional Google Analytics
If you choose Allow analytics, Google Analytics measures page visits and successful calculator/plan actions using analytics cookies. Our custom events do not include tank names, water volumes, dimensions, doses, calculation query strings, plan dates or completion marks. We send a page address without its query or fragment, and reduce any referrer to its website origin. Google may process normal connection information such as IP address and browser/device information to provide Analytics. Advertising storage, Google signals and advertising personalisation are not enabled by this feature.
Your analytics choice is stored on this device for up to 180 days. Change it through Analytics settings in the footer. Declining or withdrawing stops this site’s analytics collection and attempts to remove its Analytics cookies; it does not delete tanks or plans. It does not erase information already received by Google. See How Google uses information from sites that use its services.
Affiliate links
Some pages contain affiliate links to Amazon. Opening a buying link takes you to Amazon, which applies its own privacy and cookie policies. Amazon advertising widgets and tracking pixels are not loaded. Optional Google Analytics is controlled separately by your choice above. No calculation inputs are included in our Amazon links. Read our affiliate disclosure.