Nordkalk Filtra A products are high quality crushed limestone products developed for drinking water alkalisation. Limestone alkalisation method is ecological and safe way to increase water pH and hardness. Limestone is also inexpensive as an alkalisation material.
Nordkalk Filtra A limestone alkalisation is a solution especially for soft waters. Limestone alkalisation method is widely used in Northern European countries. Filtra A limestone alkalisation is used at water utilities, which use ground water as raw water source. The water is run through a bed of crushed limestone, which elevates the pH, alkalinity and hardness of the water.
