If you're interested in keeping a fish tank, whether it's for a school or for your own personal aquarium, then MyAquarium is the perfect app for you. It's a free app that will help you to remember when to change the water and what you should do to take care of your fish. 

MyAquarium uses a rule engine to understand what you want to do and to make the best recommendations. The application will then make suggestions based on the information you provide and will help you to get the best way to take care of your fish. MyAquarium can tell you what you should do to take care of your fish.