Sera Aqua-Test Box Freshwater Master Test KitOur Sera Aqua-Test Box Freshwater Master Test Kit is a professional set that consists of nine different water tests for aquarists and pond owners. This master test kit tests for pH, kH, GH, NH3/NH4, NO2, NO3, PO4, Fe, and Cl. Kit comes complete with glass vials and provides get entry to to Sera Online Backup. This free service is offered so you’ll evaluate the water values of your aquariums within the Sera Online Lab. Thus you’re at all times informed about the water quality. The Sera Online Lab offers you valuable clues on the right way to give a boost to them if there will have to be something unsuitable with the water values.