How often do you check your battery level water?

[Jon]

Well this probably is an old subject but its interesting to think that
this is probably one of the most over looked items on our coaches. I
try to remember once a month to refill my battery's because of a cost
of over 350 dollars for four battery's this an easy solution. All
these items such as such battery tenders and whatnot's still those
items will not let you know that your battery acid water is below the
plates. So does anyone here have any horror stories to tell about this
most forgetful item?
Jipjob
78 Wanderlodge