Maquarium for Mac

From Everyday Software:

Maquarium is aquarium management software for the novice or expert fish keeper. It allows users to track chemicals, schedule tasks, keep notes, set chemical warning alerts and manage inventory. Maquarium features a fish profile database, which is always being updated, that helps you track and maintain the delicate needs of all the fish in the tank. Furthermore, Maquarium helps the novice by warning users of dangerously high chemical values and the recommended course of treatment. Maquarium is a must have for all marine and freshwater fish hobbyists.