No hot hose down? we have a 60 gallon electric river heater...it use 2 work great...but...

we have a 60 gallon electric river heater...it use 2 work great...but as of the concluding week we have be gettin less and smaller quantity hot water till none or freshly warm....the cistern is around 10-15 years old..another entity, there is a lime build-up on the outside at the bottom of the cistern...so i guess its time for a new 1.
Vacant mobile home subject to rat?
Answers:    If it have buildup of lime and scale on the bottom it is manifestly time for a new one. Plus I'd say aloud you got your money's worth out the mature one. even if you repair this one you will have a bigger electric bill and more repairs to do contained by the future so store time and money by getting a new one. marine heaters are not expensive these days.
Hot tub drained on its own?
You answered your own quiz. You need a exotic one.