Irrigation water quality is an essential factor in plant vitality. Different quality criteria can be specified depending on use. As a result, the quality standards for hydro and pot cultures are very high, while the standards for outdoor use are less strict.
In general, water contains a variety of salts and minerals, the total content of which can indicate the possible effect it might have on plant root systems. This is relatively easy to determine by measuring the water’s electric conductivity (EC). However, such salts can also be analysed individually. Salts of the elements calcium and magnesium, the sum of which also defines water hardness, have the highest importance in terms of levels. Carbonates are the most important (carbonate hardness).