https://itunes.apple.com/us/app/aqua-calculator/id586091036?mt=8&ign-mpt=uo%3D2

The reference tool for enthusiastic reefers.
Now also available as App for your Android Smartphone / Tablet.

…why not simply carrying your Aqua Calculator along with you?

  1. -Record your tanks water parameters (chart or table view)

  1. -Use a calendar with reminder functionality

  1. -Calculate the amount of salt you need for your next water change or to adapt your tanks salinity (realistic data of nearly all available synthetic salt mixes included)

  1. -Evaluate exact dosage of salts and liquid solutions for adaptation of Calcium, Alkalinity and Magnesium according H.W. Balling’s method.

  1. -Convert units of all measured quantities of saltwater tanks (eg Salinity ↔ Density ↔ Conductivity)

  1. -Read the built in Mini-FAQs via iBooks, to manage your tank even better