High TA in fill water

[AndyJ]

Update: did a retest under more controlled circumstances. TA is really 400. Has anyone ever heard of TA this high? I'm wondering if this is something that must be lowered and what the consequences are if he does not.

He mentioned that after shocking he gets a reddish/brown tint which coats his filter cartridge. The red rinses off and he puts it back in. I was assuming that is due to low levels of iron.