Tetra presents its aquarium app, which offers aquarium enthusiasts useful functions and is intended to link the digital world to the real one. The new app bundles digital water tests with valuable knowledge and tools relating to fish, aquariums, garden ponds etc. Tetra says that new functions are also being added to the new app continuously. One of the main functions is integral digital water tests, enabling the key water parameters in the aquarium or garden pond to be determined via smartphone. In addition, users can create their own personal test result history. The new Tetra app is available now for free downloading in the Apple App Store and Google Play Store. www.tetra.net/testApp