https://market.android.com/details?id=de.xelanitram.aquacalculator&feature=search_result
https://www.androidpit.de/de/android/market/apps/app/de.xelanitram.aquacalculator/Aqua-Calculator

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, to manage your tank even better