Here in Polk County everything (dirt etc) is already red from the iron. Not sure what your environment looks like, but you might want to pick the typical brown river rocks for your stream bed and accept what nature gives you.
My challenge is my house well. Its being tested but I have hydrogen sulfide (stinky) and suspect it is related to iron.
Lots of iron here in East Texas.
4 acre pond 32 ft deep within East Texas (Livingston) timber ranch. Filled (to the top of an almost finished dam) by Hurricane Harvey 9/17. Stocked with FHM, CNBG, RES 10/17. Added 35lbs RSC 3/18. 400 N LMB fingerlings 6/18
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