I have a known problem with a lot of iron in my well water. I was talking to Jack's Magic tech support this morning about chemistry levels and one thing he suggested was adding something called filter fiber. This will top dress the sand in the filter and decreases the micron size so that the filter is better able to catch the sequestered? sequested? solids after the sequestering agent has done its job. Is this a good idea? Does it stay in after I backflush or would I have to add more each time I backflush?