To achieve a stable pH value， ensure to maintain the carbonate hardness of at least 5?dKH. Otherwise， it may cause the danger of varying pH value (acid drop!).

*Makes it easy to monitor the pH value in fresh and marine water and ponds.

In case of too low pH values we recommend sera KH/pH-plus (in fresh and marine water aquariums) or sera pond bio balance (in ponds)， in case of too high values in freshwater aquariums we recommend sera pH-minus or filtering through sera super peat.