The Aquataps dual filter package comes with two filters. These filters must be changed every 6 months or 2000 litres of water. What do our filters remove? Chlorine: 99.5% Trichloromethane: 95.78% Lead: 98.4-99.2% Arsenic: 97.8%-86.7% Iron: 99.5% Manganese: 98.7% How To Change Aquataps Filters - Watch Below Video Guide