Is that from a turbulator? If so, get rid of it, put in a standard bottom screen and a gravel bed. I am sure a few guys will argue, but... the turbulator is not worth it. If you are using your softener to remove iron "sigh..." it may help a bit but redardless, get a 40922 bottom screen, 10-15 pounds of 1/8" gravel, some 3/4" pvc pipe, and you will be much better off.
If you got resin all through your house, the resin can be a problem for a long time. It will hide in your plumbing for a while, particularly in the bottom of your water heater. Hook up a hose to the bottom of your water heater and open and close the valve repeatedly and check the water for any resin. Good luck!