How to word hauled water (tenants responsible for water) in lease

[Darby Lorents]

Hi all! This is my first time posting. We are planning on renting our primary residence starting this summer (we are moving in with our grandparents as caretakers), and I have a question about how to word something in our lease. 

How do you word that the hauled water is the tenant's responsibility to order or haul themselves? The fill-up depends on how quickly the tenant uses the water. Otherwise, as landlords, we could come out and check it every other week and then schedule the top-off. Thoughts? 

Also, the property uses propane which is filled up yearly. The propane is already full for the upcoming year; how do we include that cost? Or should we incorporate it into the monthly rent total? 

Thanks!