A fish only tank may get by on tap.
Maybe only for while until dissolved solids build up and then no good!
For any inverts or coral you are ro
or distilled IMO
The cost of this is so small in comparison to all else.
If you can not afford that then you will be mad about the money you wasted on dead stuff!
Spring water is usually worse then you tap but I can't speak for Indiana tap.
If this is your first marine tank just get good water(ro
or distilled) and go fish until you have a stable tank.