Hanna Instruments care about the success of your saltwater aquarium! It's been said that saltwater aquarium keepers are not keepers of coral or fish but rather keepers of water! That's why Hanna not only cares about you but cares about your water! Hanna Instruments has a history of developing innovative products that make analytical measurements easier to perform at an affordable price. Many innovations introduced by Hanna are now the norm for the instrumentation industry.