> You may be able to replace the electrolite with store bought electrolite.

I got 5 gallons at a battery store for $13 USD. (I figured that if I did all eight batteries then I'd need about 3 gallons.)

I did two pair yesterday. The sludge at the bottom is so heavy that it doesn't readily come out. After two gallons and six rinses, it was still coming out so I had to say "better is good enough" and put in the new electrolyte.

That leaves me wondering this: that pair was one of the second set where the water was way below the plates so I'm assuming that they are sulfated. So if I desulfate them, won't the SG go through the roof? ... I'll be monitoring the SG regularly to see if that happens.