AquaCalculator is a comprehensive app designed for marine aquarists, offering a range of features to document and manage aquariums. While focusing on saltwater aquariums, it also supports freshwater setups. Users can manage multiple tanks simultaneously, track water parameters, maintain animal records, and set reminders for routine tasks.

The app provides tools to calculate the required salt quantity for adjustments and water changes, manage nutrient levels, and adjust calcium, alkalinity, and magnesium concentrations. It includes support for various sea salt mixtures and offers detailed settings for measuring instruments and chemical recipes. Additionally, AquaCalculator features a mini-FAQ section to address common queries related to water values and reef aquarium care.