iron water/ rust

If you are staying around the Chain-O-Lakes area you will need an inline filter.

The filters normally last pretty long but the iron in N.Illinois is pretty bad. When I stayed there I had to replace it every month. But well worth it because that stuff not only makes stains in the toilet it coats all your water lines. If you don't put a filter on the stains in the plastic rv toilet and the stainless steel will be become permanent.

They are not that expensive and you can find them in Wallmart.

Here is a link to a similar post. Has a lot of info.