What do you mean your well "tests very good"? Almost all water (other than RO or distilled) has some dissolved minerals in it that is not good for a battery, regardless of how it tests. At less than one dollar a gallon for distilled water, there is no reason to use anything else.
Using distilled water ensures there is nothing else being added to the electrolyte (the "battery fluid") that will affect it. It may be a little inconvenient, but a trip to the local grocery store and a buck is worth it to help your batteries stay healthy.
Dave
__________________
Dave, Barb, and Paisley the Wonder Wiemeraner
Was - 2015 3160RL Legacy Edition & 2014 F350 6.7l PSD SRW Platinum
Now - SOB
|