Battery Experts, Reconditioning vs Equalization??

Reconditioning a.k.a. desulfation , can run for hours or even days without harm to batteries
The longer the better

Equalization , controlled over voltage to stir the electrolyte and equalize the specific gravity of all cells, is temperature sensitive and should only be done as a *timed* controlled event
Do it ONLY when your are there to keep watch , check on the batteries