As a matter of periodic planned maintenance
, I’m not usually very concerned with the bare minimum, that I can (or might) “get away with”.
Given the ready availability & low cost of Distilled/Demineralized water
; I see no routine reason to plan on using anything else in flooded batteries
MidLandOne is correct, that a water
analysis (or TDS reading), along with Table 3, can be used to determine the acceptability of alternate sources, when unusual conditions require
BTW: I’ve owned several TDS meters, ranging in cost from $14 to $125; and never noted a significant difference in their readings. I recommend that every cruiser (using a watermaker
, or taking water from unknown shore supplies), obtain & use one.
I’m certain that Alan (redcobra) did far less harm (if any) to his batteries, in replenishing them with bottled water; than would have occurred with exposed plates had he not replenished at all. I'm just as certain that he would have been wiser to obtain distilled water, if possible.