Contact

Email support@gillcalc.com. One inbox, read by the person who maintains the site.

Corrections are the most useful message. If a result looks wrong, include the calculator, the inputs you used, the number you got and the number you expected — plus a source if you have one. Rule corrections are logged and the page's confidence grade is updated when a source changes.

What we cannot do. We cannot diagnose a sick fish or prescribe treatment. For animal health, contact a veterinarian or a local aquarium club.

Typical reply time is a few days. gillcalc is a small independent project run by Nan Liang.