Iron Buster 1 cu ft birm system Fleck 2510SXT Iron, Manganese Water Filter
Birm® Iron Filter. If your pH is less than 6.8 a pH filter is required for the Birm system to work properly. Both of these problems can be eliminated with the Birm® System. 1 ft.3 Birm System. 2 ft.3 Birm System.