Q1. What would the mold be eating? It shouldn't increase rust.
But if you aren't going to use it for a long period of time, draining it would be best... and shouldn't be that hard.
Q2. You could. I remember when my grandmother would fill the tub about quarter/half way and then poor water from the kettle heated on the wood stove to warm it up.
Since I prefer showers now... that is a bit harder to do.
|