it must have been the tainted water, the light-hour change would not do that ... I have no experience with poisoning my plant, but I think I would leave it on the 12/12, the dark hours may help it snap back, since the photosynthesis would be slowed down, ... it is my non-expert hunch, the growth slowdown may also slow the vinegar's progress thru the plant until it has a chance to break down into harmless elements ... well, thats what we wish for, anyway ... :smokin: