The RFFE20-BB Iron Reducing Filter will remove up to 3ppm of iron according to the manufacturer's specification sheet shown on the Specs tab. If you have low level iron this filter would be applicable. It is recommended to have sediment filtration prior to this cartridge to ensure that it does not fail due to sediment filling the carbon pores. From your description, it would be wise to add a second filter housing and place the DGD-5005-20 Dual Gradient Sediment Filter before the RFFE20-BB. This would provide a good two step filtration prior to the installed UV System.